Cold River Canine Anatomy and Working Structure · Chapter 6
Boerboel Feet, Pasterns and Nail Care: The Foundation of a Working Dog
Toes, pads, pasterns and claws, and why each one deserves a closer look.
By Cold River Boerboels · Updated November 10, 2026
A Boerboel can have an impressive front assembly, a strong back and a powerful rear, but every step still meets the ground through its feet. Big bone and a big chest mean very little if the dog is sore where it touches the ground. The toes, pads, nails and supporting tissues deserve the same attention as the larger structures above them.
At Cold River Boerboels, our preference is a dog that is strong and agile, not clumsy. Feet belong in that assessment. They also belong in everyday care: a painful nail, damaged pad or injured toe can matter long before an owner notices a change in the dog's overall outline.
This chapter examines compact versus splayed feet, toe shape, front and rear pasterns, pad function and nail maintenance. It also goes deep on one thing owners control every week: how a nail that reaches the floor changes toe posture, grip and drive, and how that compensation travels up through the pasterns, shoulders, hips, stifles, hocks and spine.
The foot is more than the outline of the paw
Several structures can look similar in a photograph while representing different things. The digits are the toes; their small bones are the phalanges. The digital pads are the small pads beneath the main toes. The larger main pad is called the metacarpal pad in the front foot and the metatarsal pad behind. The claw is the nail, and the quick is its sensitive living core.
“Splayed” describes how toes spread apart. “Turned out” describes the direction the foot points. “Flat” describes a profile. Those observations can occur together, but they are not synonyms and do not identify a cause.
Visual 1. Original educational map; anatomical terminology accompanies the paw-pressure studies. [4], [6], [7] No pressure values are implied.
The useful first question is not simply whether a paw looks large. It is whether the toes, pads and supporting structures form a comfortable, usable foot, and how that foot behaves in standing and repeated movement.
What the Boerboel standard calls for
UKC: rounded feet, knuckled toes and sturdy pasterns
The UKC South African Boerboel standard describes proportionate, rounded, well-padded feet with well-knuckled toes. The front paws are slightly larger than the rear. It permits a slight front-foot turnout in stance, while asking for forward-pointing feet and firm support in movement. [1]
Front pasterns should be short and sturdy, with a slight slope from the side and straight alignment with the forearm from the front. Weak pasterns are a serious fault. Rear pasterns should be short and strong, parallel from behind and upright from the side. [1]
The American Boerboel Club's published standard
The American Boerboel Club describes large, round, compact front feet, arched toes, short nails and thick, tough pads. It calls for a short, substantial front pastern with a slight side-view slope, and an upright rear metatarsus. [2]
For Cold River, the breeding message is clear: we seek a substantial, compact foot with usable support. A breed-standard description guides selection and appraisal. It is not a scientific formula predicting injury or pounds pulled.
Toe grouping. What we look for: Compact, arched / knuckled appearance. Keep separate: Normal movement-related spreading versus persistent open toes.
Foot direction. What we look for: Forward travel; UKC permits slight front turnout at rest. Keep separate: Foot direction versus the spacing between individual toes.
Front pastern. What we look for: Short, substantial, slight side-view slope. Keep separate: Normal slope versus marked lowering or instability.
Rear pastern. What we look for: Short, strong and upright in side view. Keep separate: Rear metatarsal posture versus front metacarpal posture.
Compact feet, hare feet and splayed feet are different
A compact foot groups the toes closely. A hare-type foot has relatively elongated central toes; splaying describes separation between toes. Zink and Schlehr distinguish these forms and discuss why toe grouping may matter for working dogs. That is structural guidance, not a controlled Boerboel injury experiment. [3]
Visual 2. Compact versus elongated feet. M. R. Schlehr, Figure 8 in Zink & Schlehr (2020). [3] Unaltered. Credits and CC BY license below.
Visual 3. Splayed-toe example; not a Boerboel diagnosis. M. R. Schlehr, Figure 9 in Zink & Schlehr (2020). [3] Unaltered. Credits and CC BY license below.
Cold River prefers the compact form described for the Boerboel. That is a breed-specific selection preference. We would not label every naturally longer foot in another breed defective, or assume that every toe spread during loading represents a permanent structural fault.
The important comparison is repeated and fair: the same dog, relaxed on a level surface, then moving on secure footing. Does a toe remain unusually separated? Has the appearance changed? Is the dog reluctant to bear weight? A new change deserves more attention than a single awkward frame.
Why a compact foot is desirable here
It fits the Boerboel standard and Cold River's aim of substantial structure that remains usable in work. It also gives us a consistent feature to assess alongside movement, health history and the rest of the dog. We do not need to attach an unsupported performance percentage to make that preference meaningful.
A very tight-looking foot is not automatically healthy, just as a broad paw is not automatically powerful. The evaluation still has to include comfort, pad condition, nail condition and the way the dog uses the foot.
Understanding the front and rear pasterns
In canine conformation language, the front pastern is the metacarpal region between the carpus, or wrist, and the toes. The rear pastern is the metatarsal region between the hock and the toes. The regions look and function differently; the front's slight standing slope should not be copied onto a diagram of the rear. For the structures above the wrist, read Chapter 5 on front assembly and shoulder angulation.
Visual 4. Original schematic. All toes face horizontally to the right. The markedly low posture is not attributed to nail length. The standard asks for slight front slope, not an exact illustrated angle. [1], [2], [12]
The standards ask for support, not a leg that is completely rigid. A slight standing slope in front and motion during a stride are different observations from a markedly lowered wrist. See Chapter 4 on gait and movement for why a repeated moving pattern adds information to the stack.
A lowered carpus can also be a clinical problem. The Merck Veterinary Manual describes palmar carpal breakdown following damage to palmar ligaments and supporting fibrocartilage, with pain, swelling, lameness and a characteristic low stance. That is an injury process requiring assessment; it should not be diagnosed as “long nails” from a picture. [12]
Visual 5. Front-view alignment. M. R. Schlehr, Figure 6 in Zink & Schlehr (2020). [3] Unaltered. Credits and CC BY license below.
From the front, distinguish the direction of the paw from a bend through the limb. From the side, distinguish the forearm, wrist, pastern and toes. Describing the actual location of a concern makes the discussion more useful than calling the whole front “weak.”
Paw pads are working tissue
Miao and colleagues examined canine pad tissue and used computer modelling to investigate cushioning. Their work describes a protective outer region, collagen-rich dermis and compartmentalized fatty tissue acting together. The modelling supports a role for that organization in managing impact; it does not prescribe an ideal pad thickness for a Boerboel. [4]
Visual 6. Original teaching diagram based on Miao et al. [4]. The epidermal region includes microstructures omitted here. Tissue proportions are illustrative.
Chi and Roth's comparative study of carnivoran footpads found that pad size and stiffness vary with body mass. This is evidence that soft-tissue mechanics matter, not just the size of the footprint. It is not a justification for deliberately increasing a Boerboel's weight or assuming its pads make any load harmless. [5]
For owners, the practical implication is to inspect the pads as tissue: look for a cut, split, abrasion, tenderness or a foreign body. Tough-looking skin is still living tissue, and working enthusiasm does not substitute for a close inspection.
Not every part of the paw carries the same load
Besancon and colleagues measured individual pad forces in Greyhounds and Labrador Retrievers. Their study showed differences in pad loading between limbs and breeds. A later pressure-plate study by Schwarz and colleagues in 20 sound Labradors also found that loading and its timing differed across regions of the paw. [6], [7]
That is why we should avoid saying that the main pad carries everything or that one photograph reveals a dog's pressure distribution. The digital pads and main pad participate in a changing contact pattern. A pressure map is a measurement from particular conditions, not a universal picture of ideal foot function.
How nail length changes posture, grip and power
Nail length is one of the few parts of foot structure an owner controls every week, and one of the most underrated. When a nail grows long enough to meet the floor before the pads settle, the effect does not stay in the nail. It changes how the toe sits, where weight lands on the paw, how much grip the foot has, and how the limb and back above it have to organize around that change.
This section follows that chain from the ground up: the normal arched foot, what a long nail does to it, why that costs traction and drive, how the compensation travels to the pasterns, shoulders, hips, stifles, hocks and spine, and what controlled research has and has not measured so far.
The arched foot, viewed from the side
Each main toe has three small bones, the phalanges, joined at three joints: the joint where the toe meets the pastern (the metacarpophalangeal joint in front and the metatarsophalangeal joint behind, MPJ for short), the proximal interphalangeal joint (PIJ) and the distal interphalangeal joint (DIJ). In a well-knuckled foot those joints form a raised, stepped arch. The digital pads sit under the toes, the main pad sits behind them, and the nail tip sits just off the floor. [14]
That arch is held by muscle and tendon, not just bone. The deep digital flexor tendon runs to the last toe bone, the third phalanx, which carries the nail. It curls the toe and presses the digital pad and nail into the ground. The superficial digital flexor tendon inserts on the second phalanx; Zink and Schlehr describe it as what gives the toes their spring-like action. The interosseous muscles and the sesamoid bones behind each MPJ support the joint from below. [3], [14]
Together, that is the foot's working platform. Zink and Schlehr note that the front limbs must grip a stable surface to transfer power. A firm, stepped toe puts the flexors in a good mechanical position to do exactly that. [3]
Visual 7. Original Cold River schematic of one front toe. Left: a raised, stepped arch with the nail tip clear of the floor. Right: a long nail reaches the floor first, the toe flattens and weight shifts back onto the main pad. [3], [8], [14], [17]
What happens when the nail reaches the floor first
A nail that is too long meets the floor before the pads are fully loaded, and the floor pushes back. Because the nail is fixed to the last toe bone, that force levers the toe up and back and rotates its joints out of the arch. Conditioning, physiotherapy and rehabilitation sources describe the same sequence: toes pushed backward or upward, toes that spread apart, a pastern that sinks, and weight that slides back onto the main pad. [14], [15], [17]
Häusler and Söhnel summarize that clinical view in their 2026 study: long nails that contact the ground are generally believed to alter a dog's posture, shift its weight backward and put more load on the large main pad. They are careful to say the belief has not been scientifically validated. We come back to what their measurements showed below. [8]
The toes are also sense organs. Veterinarian Dr. Julie Buzby describes the toes as rich in proprioceptive receptors, the sensors that tell the brain where the body is in space. Luanna George, a licensed veterinary technician and certified canine rehabilitation practitioner, writes that constant nail contact tells the brain the dog is standing or walking on a hill. The dog adjusts its posture as if it were going uphill, and its muscles are trained to treat that posture as the new normal. [16], [17]
At the toes. Toes are levered up and back, spread apart, or both. The digital pads lose firm contact. [14], [15]
Across the paw. More weight falls on the main pad and less on the toes. The stepped profile flattens. [8], [14]
In the stance. Buzby describes the forelegs settling behind vertical and the hind legs drifting forward under the body. [16]
In the nervous system. A constant uphill signal from the toes, which the dog answers with posture changes throughout the body. [16], [17]
Why long nails cost grip and drive
The nail is part of the foot's traction system. In high-speed gait research, Hudson, Corr and Wilson reported that the claws of racing greyhounds and cheetahs dug into artificial grass for grip; on a roughened concrete runway, where the claws could not dig in, the greyhound's feet slipped. Wilson and colleagues later described the cheetah's ridged pads and claws as acting like the cleats on a sports shoe, and a study of cheetah and greyhound forelimb anatomy described the digital flexors digging the toes in for traction. [19], [20], [21]
A Boerboel is not a cheetah, but the principle carries over. Grip comes from a toe that can flex and set its pad and nail into the surface. That needs a nail of working length on a toe that can still curl. A nail long enough to prop the toe up on hard ground removes that option. Buzby compares functional nails to soccer cleats, and the comparison works both ways: cleats help when they bite, and they become a liability when they are so long the sole cannot meet the ground. [16]
Surface matters too. Roush and colleagues noted that on slick surfaces dogs tend to flex their toes and engage their nails rather than their pads, which works against them when the nails cannot penetrate the floor. On hard, smooth ground, it is the pads that grip. [18]
Put together, the sources describe four ways long nails cost a working dog power:
Less traction. The digital pads and nails lose their cleat-like purchase, so less of each push reaches the ground. [14], [16], [19]
A flatter, less efficient platform. A collapsed arch is a softer lever. More force is absorbed in the foot instead of being transmitted forward. [14]
Compensation up the limb. The carpus or tarsus, elbow or stifle, shoulder or hip, and the spine take up the slack, spending energy and taking on load they were not built to carry. [15], [17]
Stretch-weak muscles. The deep and superficial digital flexors and the interosseous muscles, held in a lengthened position, cannot produce force as well. [14]
George lists "lack of ability to drive" among the consequences she sees in long-nailed dogs. For a pulling dog, drive is the whole event. A Boerboel in the harness lowers its body, sets its feet and pushes the load forward one step at a time, and every one of those steps starts with the toes gripping the track surface. Agility dogs face the same demand when turning and braking, and working farm dogs face it on mud, rock and slope. Our guide to the Boerboel weight pull explains how that work is structured and judged. [17]
Visual 8. Original Cold River schematic. Numbered sites follow clinical observations reported by veterinary rehabilitation and physiotherapy sources. The controlled research summarized below has not measured these effects as a dose-response. [15], [16], [17]
How the compensation travels up the dog
A dog does not adjust one joint at a time. When the foot changes, the limb above it reorganizes, and the back above that follows. Rehabilitation sources describe the pattern below. These are clinical observations rather than results of a controlled trial, and how far they progress varies a great deal between dogs.
Stride and gait
Normal foot placement runs heel to toe as the limb reaches forward, then the weight rolls over the foot as the body passes above it, moving from braking into propulsion. George describes long nails disturbing that sequence, with dogs that struggle to rise and to start a walk or trot. Apollo Animal Physio describes altered paw placement, changed limb alignment and reduced grip as the immediate effects of long nails. [15], [17]
Pasterns and wrists
A flattened toe chain lets the pastern sink. Zink and Schlehr explain that repetitive strain on the superficial digital flexor tendon can permanently lengthen it, which increases extension at the carpus and flattens the phalanges. That is the route from a flat foot to a weak-looking pastern. It is also why a lowered pastern always deserves the question of what the toes and nails look like. [3]
Shoulders, elbows and the front assembly
With the forelegs settled behind vertical, the front assembly carries the body at a different angle from the one it was built for. Apollo Animal Physio reports chronic muscular tension and added joint wear in dogs that compensate for poor paw placement over time. Chapter 5 on front assembly and shoulder angulation covers the structures involved. [15], [16]
Hips, stifles and hocks
George writes that this compensation "puts stresses on all of the joints and also puts extra load on the weight bearing surfaces of the hips, stifles and hocks." She describes the dog's center of mass shifting toward the hind end, and her list of hind-limb findings in long-nailed dogs includes sacroiliac pain, hip dysfunction, stifle and hock hyperextension, patellar ligament disorders and hamstring muscle fibrosis. [17]
We want to be precise here. Long nails do not cause hip dysplasia, which is a developmental condition. What clinicians describe is extra load and altered joint angles on top of whatever the dog already has. For a heavy, rear-driven breed, that is a reason to keep the rear feet as tidy as the front. Chapter 2 on rear angulation and stifle anatomy explains how those joints are meant to work together. [17]
Back and spine
George also lists an altered spinal contour, including a roached or kyphotic topline, along with strain at the spinal transition zones, spondylosis, facet damage and lumbosacral hyperflexion, among the findings she associates with long nails. A dog that braces itself as if it were permanently standing on a hill changes the way it carries its back. Chapter 3 on the Boerboel topline explains why that region matters for a dog that drives from behind. [17]
The feet themselves
Constant contact keeps the toes stimulated. George notes that some long-nailed dogs become sensitive about having their feet touched, and structural damage can make the feet harder to handle. That makes the next trim harder, and the nails grow longer. It is a cycle worth breaking early. [17]
Over time: stretch-weak flexors and flat feet
Canine conditioning coach Anna Lee Sanders explains the long-term risk in muscle terms. When the toes are held out of their arch, the digital flexors and interosseous muscles sit in a lengthened position and gradually become stretch-weak. Weaker flexors hold the arch less well, which lets the toes flatten further. [14]
She writes that, left unaddressed, flat feet "can progress into downed pasterns (front or rear), sprung toe / ruptured deep digital flexor and /or flat toe," and "even into plantigrade posture," in which the dog bears weight along the whole pastern. Zink and Schlehr describe the same structural endpoint from the tendon side: repetitive strain permanently lengthening the superficial digital flexor tendon, with flatter toe bones and more extension at the carpus. [3], [14]
Not every long-nailed dog follows that path, and flat feet have other causes, including genetics, injury and conditioning. But the anatomy and the rehabilitation literature point in the same direction. Sanders also publishes foot-strengthening exercises for rebuilding those muscles once the nails are back to length. [14]
What controlled research has measured
Ahmed and colleagues reviewed nail clipping in UK primary veterinary care. Their 2025 study sampled 2,440 nail-clipping cases from a much larger practice population, with overgrown or ingrown nails and broken claws among the documented reasons. Nail care is an everyday clinical issue, not a cosmetic one. [10]
A 2026 study measured before and after trimming
Häusler and Söhnel analyzed immediate pre- and post-trim treadmill measurements in seven clinically sound dogs. Overall stride, timing and vertical-force measures did not change significantly. Paw-level measures did: before trimming, the front paws measured about 2 mm longer, and the side-to-side center of pressure differed slightly. [8]
That fits a careful reading. In sound dogs, one trim did not visibly change the whole gait on a treadmill, but it did change how the paw met the ground. The study did not follow dogs whose nails had been long for months, did not test strength or traction, and did not involve pulling. The authors also raised the possibility that in some dogs long nails are a result of altered gait rather than its cause, because a dog that loads its toes differently also wears them differently. [8]
Visual 9. Häusler & Söhnel (2026), Figure 1. [8] © authors; source, CC BY 4.0; unaltered. Arrows mark claw contact; blue-to-red indicates increasing pressure. These examples are not proof of an ideal pressure pattern.
An agility survey found an injury association
Sellon and colleagues found an association between owner-reported long nails and digit-injury history in agility dogs: an odds ratio of 2.4, with a 95% confidence interval of 1.3–4.5. This observational result cannot show that nail length caused the injury, and an odds ratio is not an individual dog's probability of injury. The authors concluded that keeping nails short for training and competition may decrease the risk of digit injuries. [9]
These studies ask different questions. A survey of athletic injury history and an immediate treadmill comparison need not give the same kind of answer. Together, they support keeping a working dog's nails short, without promising that a single trim will visibly change gait on a treadmill.
How we read the evidence
The mechanism is plain anatomy: the nail is fixed to the last toe bone, and a nail pressed into the floor moves that bone. Rehabilitation clinicians, physiotherapists and conditioning coaches describe the same downstream pattern. The one small controlled study found measurable paw-level changes but no whole-gait change right after a trim. The one large survey of athletic dogs linked long nails to digit injuries. [8], [9], [14], [15], [17]
What is still missing is a long-term controlled study measuring nail length against strength, traction or pulling output. Until that exists, we treat the clinical picture as a strong practical reason to act, not as a measured percentage. Keeping nails short costs a few minutes a week. Letting them grow, in a dog asked to drive thousands of pounds forward, is a risk we will not take.
Temporary posture changes versus lasting damage
With sufficiently excessive growth, a claw can physically interfere with comfortable placement or penetrate nearby skin. VCA's nail-care guidance specifically notes that neglected dewclaws can curl into the pad. That is a direct welfare reason to maintain nails, regardless of whether a gait study detects a large stride change. [11]
A dog may stand or use a painful foot differently. Whether that improves after care depends on what is wrong. A change in stance is not proof that a bone, tendon or ligament has permanently changed. Likewise, trimming away excess nail cannot be assumed to repair an established injury.
Long nails touching the floor. What may change: Toe position, weight distribution across the paw, foot placement and willingness to load. What we can responsibly say: Trim back to length. Paw-level changes are measurable; one trim should not be expected to transform the whole gait. [8]
Ingrown nail or damaged nail unit. What may change: Local tissue, comfort and limb use. What we can responsibly say: This is a clinical problem; severity and recovery require assessment.
Established tendon, ligament or joint injury. What may change: Toe posture, support and loading can remain abnormal. What we can responsibly say: A nail trim does not reverse the underlying lesion.
Long-standing nail contact and flattened toes. What may change: Toe arch, flexor strength and pastern support over time. What we can responsibly say: Rehabilitation sources describe progression toward flat toes and dropped pasterns. No controlled study yet gives a timetable or a Boerboel threshold. Restore nail length early and recondition the foot. [3], [14]
Lasting toe changes are possible, but the cause must be established
Cheng and colleagues used an experimental flexor-tendon repair and graft model in 12 dogs to study digit loading. This demonstrates that the condition and treatment of digital tendons belong in a scientific investigation of foot function. It was not a nail-overgrowth experiment. [13]
Our conclusion: long nails change how the foot works, and left long they push the toes, the pasterns and the rest of the dog toward patterns that can become hard to reverse. Established tendon, ligament or joint injuries are a separate problem. A trim will not repair them, and they need their own diagnosis.
For a dog with a persistently flat toe, new splaying, a lowered wrist or lameness, get the cause evaluated. If a foot remains abnormal after appropriate nail care, that is a reason for further assessment, not a reason to keep cutting the nails shorter. Swelling around the wrist or hock that comes with fever, or lameness that moves between legs, can also point to infection. Our guide to tick-borne disease and swollen joints explains what to ask your vet.
How short is short enough?
The practical standard is simple. With the dog standing square and relaxed on a hard, level floor, the nail tips should just clear the floor or barely brush it. VCA puts it plainly: if the nails touch the ground when the dog stands, they are too long. Apollo Animal Physio suggests sliding a sheet of paper under the front of the paw while the dog stands; it should pass under the nail tips without catching. [11], [15]
Clicking on a hard floor is a prompt to check, not the whole assessment. Nails are supposed to meet the ground when the toes flex and grip in motion, especially on soft footing or when the dog digs in to pull. The standing check is about the relaxed stance, where a nail that props the toe up is doing its damage all day.
Check the rear feet as carefully as the front. Rear nails often wear differently, and a heavy dog that pushes from behind needs its rear toes working too. Long-neglected nails usually cannot be brought back to that length in one session, which is where the quick comes in.
Visual 10. Original Cold River schematic based on veterinary nail-care guidance. Check from the side at floor level with the dog standing square on a hard, level floor. Not a cutting template. [11], [15]
The quick limits what can safely be shortened
The quick contains blood vessels and nerves. In a nail that has been allowed to grow long, it may extend farther toward the tip, limiting how much can safely be removed at once. VCA recommends small, controlled reductions, particular caution with dark nails and professional help where needed. Small, frequent trims are how an overgrown nail is walked back to a working length. [11]
Visual 11. Original teaching diagram following the clinical explanation in VCA. [11] Not a cutting template. The quick and safe shortening limit vary by nail.
For Cold River, a maintenance plan should be sustainable and comfortable. Nail care is not a contest to get the shortest-looking nail in one session. A photograph cannot reveal the quick inside a dark claw, and no diagram can supply a safe cutting depth for every dog.
Do not forget the dewclaws
The front dewclaw has tendinous attachments; it is not simply an unattached nail. The anatomical illustration below makes those connections visible. [3]
Visual 12. Front dewclaw attachments; drawing references Miller and Evans’ canine anatomy text. M. R. Schlehr, Figure 10 in Zink & Schlehr (2020). [3] Unaltered. Credits and CC BY license below.
The agility survey also associated absent front dewclaws with digit-injury history. That association does not prove that removal caused an injury. [9] For this chapter's care message, the immediate point is straightforward: inspect and maintain any dewclaws the dog has.
A practical foot and nail routine
This is Cold River's observation routine, not a substitute for an examination:
Check all four feet regularly. Look at the toe spacing, pads, nail tips and spaces between the toes. Include the dewclaws.
Use an individual schedule. Inspect often enough to catch excessive growth. Activity, surface and natural wear vary, so one trimming interval will not suit every dog.
Check standing clearance. With the dog square on a hard, level floor, the nail tips should just clear or barely brush the floor, front and rear. Look at toe shape and comfort at the same time. [11], [15]
Trim conservatively. Have a veterinarian or experienced professional demonstrate the technique on your dog. Work within the quick's actual limits. [11]
Record changes fairly. Compare relaxed standing photographs and normal-speed movement on the same level surface. Keep the date and nail-care history.
Inspect after work. Check for a split nail, irritated toe or pad damage before another session.
Escalate a problem, not the exercise. A swollen toe, embedded nail, bleeding injury, persistent limp or lowered wrist needs assessment before demanding work.
Good handling also matters. VCA recommends building tolerance gradually and breaking nail care into manageable steps. [11] For a large Boerboel, comfortable, cooperative foot handling is a useful lifelong skill.
Feet and a working Boerboel
Farm movement, turning, braking and dog weight pulling all depend on the dog's grip on the ground, and in a pull that grip is where the force starts. We keep our dogs' nails short through training and competition, and we check them before every session. No study has yet measured how many pounds a long nail costs. We do not need that number to know which side of the question we want our dogs on.
The same whole-dog principle links this chapter to the front assembly, rear angulation and the stifle, the topline and gait and movement. The feet complete that discussion at ground level. Our custom harness page covers another part of preparing the individual dog for its work.
Questions about Boerboel feet, pasterns and nails
Are splayed feet the same as turned-out feet?
No. Splaying describes toe separation; turnout describes foot direction. They need to be recorded separately.
Should a Boerboel have compact feet?
The breed descriptions discussed here call for rounded, compact or well-knuckled feet. That is also Cold River's selection preference, assessed alongside health and movement. [1], [2]
Are front and rear pastern angles supposed to match?
No. The cited standards describe slight front-pastern slope and an upright rear metatarsal region. [1], [2]
Will a nail trim fix flat toes or weak pasterns?
It removes the most common mechanical cause. If the toes flattened because long nails were levering them up, getting the nails back to length and rebuilding the digital flexors with conditioning gives the foot its best chance. If the cause is a tendon, ligament or joint injury, a trim will not fix it and the dog needs a veterinary assessment. [3], [14]
Can long nails cause permanent damage?
They can contribute to it. Rehabilitation sources describe long-standing nail contact progressing to stretch-weak flexors, flat toes and dropped pasterns, and badly overgrown nails can curl into the pad. Controlled research has not yet put a timetable on it, and we would not wait to find out. [11], [14]
How short should a Boerboel's nails be?
Short enough that the tips just clear or barely brush a hard, level floor while the dog stands square. If they touch the floor while the dog is standing, they are due for a trim. [11], [15]
Do long nails reduce a Boerboel's pulling power?
Rehabilitation sources describe long nails reducing traction, flattening the foot's platform, weakening the digital flexors and reducing drive. No study has measured the loss in pounds, but for a pulling dog we treat short nails as part of preparation. [14], [16], [17]
Can long nails affect the hips, stifles, hocks and back?
Clinicians report that they can. Long nails shift the dog's weight toward the rear and change its posture, which adds load to the hips, stifles and hocks and can change the topline. These are clinical observations rather than controlled-trial results. [16], [17]
Is a working dog guaranteed to wear its nails down enough?
We would not bet a dog's feet on that assumption. Check the actual nails, including the dewclaws, and maintain them as needed.
The Cold River position
Feet deserve deliberate breeding judgment and consistent care. We look for the compact, substantial support described for the Boerboel, then evaluate comfort and movement in the complete dog. We keep nails short enough to clear the floor, because a foot can only grip, and a dog can only drive, from a working arch. We keep nail care routine and take a recurring change seriously.
The work reaches the ground through the feet. They deserve the same attention as everything above them.
Continue the series
Read Chapter 1: the croup and rear angulation, Chapter 2: rear angulation and stifle anatomy, Chapter 3: Boerboel topline and rear-high structure, Chapter 4: Boerboel movement and gait and Chapter 5: Boerboel front assembly and shoulder angulation. For the work this structure has to do, see the documented 22,039-pound world-record pull and our Boerboel strength and performance questions. Find new chapters in the Performance Dog Journal.
References and evidence notes
Twenty-one sources: twelve original research papers, one review, two breed standards, two clinical-care references and four veterinary rehabilitation, physiotherapy and conditioning articles. No controlled study listed here measures nail length against a Boerboel's pulling output or tracks nail overgrowth through to permanent pastern change; the rehabilitation articles describe what clinicians see in practice.
United Kennel Club. South African Boerboel breed standard. Feet, Forelegs, Hindquarters and Gait. Registry standard; accessed October 29, 2026.
American Boerboel Club. Official standard of the Boerboel. Forequarters and Hindquarters. Breed-club publication; accessed October 29, 2026.
Zink C, Schlehr MR. Working Dog Structure: Evaluation and Relationship to Function. Frontiers in Veterinary Science. 2020;7:559055. Review; Figures 6, 8, 9 and 10. Structural guidance, not a Boerboel nail trial.
Miao H, Fu J, Qian Z, Ren L, Ren L. How does paw pad of canine attenuate ground impacts? A multi-layer cushion system. Biology Open. 2017;6(12):1889–1896. Post-mortem tissue work in six dogs and finite-element modelling; no direct Boerboel trial.
Chi KJ, Roth VL. Scaling and mechanics of carnivoran footpads reveal the principles of footpad design. Journal of the Royal Society Interface. 2010;7(49):1145–1155. Comparative footpad mechanics.
Besancon MF, Conzemius MG, Evans RB, Ritter MJ. Distribution of vertical forces in the pads of Greyhounds and Labrador Retrievers during walking. American Journal of Veterinary Research. 2004;65(11):1497–1501. Pad-level force measurements; two breeds.
Schwarz N, Tichy A, Peham C, Bockstahler B. Vertical force distribution in the paws of sound Labrador retrievers during walking. Veterinary Journal. 2017;221:16–22. Pressure-plate study; 20 sound adult Labradors.
Häusler K, Söhnel K. Trimming of nails in healthy dogs does not change gait parameters when comparing pre- and post-nail trim. Frontiers in Veterinary Science. 2026;13:1728382. Seven-dog retrospective immediate pre/post comparison; no long-term injury test.
Sellon DC, Martucci K, Wenz JR, Marcellin-Little DJ, Powers M, Cullen KL. A survey of risk factors for digit injuries among dogs training and competing in agility events. Journal of the American Veterinary Medical Association. 2018;252(1):75–83. Observational owner survey; associations do not establish causation.
Ahmed LA, Somarriba M, Brodbelt DC, Church DB, O’Neill DG. Epidemiology and clinical management of nail clipping in dogs under UK primary veterinary care. Journal of Small Animal Practice. 2025;66:925–933. Primary-care records; 2,440 sampled cases.
Barnes C, Barnette C. VCA Animal Hospitals. How to Trim a Dog’s Nails. Veterinary client-care guidance; quick anatomy, gradual handling and dewclaw care. Accessed October 29, 2026.
Lafuente P. Merck Veterinary Manual. Joint Trauma in Dogs and Cats. Palmar Carpal Breakdown section. Reviewed/updated December 2025. Clinical reference, not a nail-length study.
Cheng YS, Reisdorf R, Vrieze A, Moran SL, Amadio PC, An KN, Zhao C. Kinetic analysis of canine gait on the effect of failure tendon repair and tendon graft. Journal of Biomechanics. 2018;66:63–69. Experimental tendon-repair/graft model in 12 dogs; not nail-induced damage.
Sanders AL. Canine Conditioning Coach. Understanding Canine Foot Alignment: Flat Feet, Splayed Feet, and Collapsed Arches. September 6, 2025. Canine conditioning article by a certified conditioning coach; foot anatomy, postural deviations and progression. Not a controlled study.
Apollo Animal Physio. Why Your Dog's Nail Length Is More Important Than You Think. Veterinary physiotherapy practice article; paw placement, limb alignment, grip and the paper test. Accessed November 10, 2026.
Buzby J. ToeGrips. Proper dog nail care can significantly improve quality of life! Veterinarian-written client article; proprioception, stance and traction. The author's company sells a traction product. Accessed November 10, 2026.
George L. Abbott Road Animal Hospital. The Importance of Nail Trims. Clinical rehabilitation commentary by a licensed veterinary technician and certified canine rehabilitation practitioner; posture, drive, spinal and hind-limb findings. Accessed November 10, 2026.
Roush JK, Moore LE, Renberg WC. Dr. Buzby's ToeGrips Application Results in Minimal Changes in Kinetic Gait Parameters in Normal Dogs. Frontiers in Veterinary Science. 2017;4:111. Kinetic gait study in normal dogs; discussion of nail and pad grip on slick surfaces.
Hudson PE, Corr SA, Wilson AM. High speed galloping in the cheetah and the racing greyhound: spatio-temporal and kinetic characteristics. Journal of Experimental Biology. 2012;215(14):2425–2434. Force-plate and high-speed video study; claw grip and slipping.
Hudson PE, Corr SA, Payne-Davis RC, Clancy SN, Lane E, Wilson AM. Functional anatomy of the cheetah (Acinonyx jubatus) forelimb. Journal of Anatomy. 2011;218(4):375–385. Comparative dissection of cheetah and greyhound forelimbs; digital flexors and traction.
Wilson AM, Lowe JC, Roskilly K, Hudson PE, Golabek KA, McNutt JW. Locomotion dynamics of hunting in wild cheetahs. Nature. 2013;498(7453):185–189. Field study with GPS and inertial collars; pads and claws described as cleats.
Illustration credits and reuse
Visuals 2, 3, 5 and 12: illustrations by M. R. Schlehr, in Zink & Schlehr (2020), Figures 8, 9, 6 and 10 respectively. © 2020 Zink and Schlehr; original publication, CC BY 4.0. Published images are unaltered. Figure 10 identifies Miller and Evans’ canine anatomy text as its anatomical source. Visual 9: © 2026 Häusler and Söhnel, CC BY 4.0, original source linked in its caption. New surrounding captions are editorial additions. The remaining visuals, including Visuals 7, 8 and 10, are original Cold River educational schematics for this chapter.
Published drawings are general canine examples, not images of Cold River dogs. Anyone reusing them must keep the author, publication, license and alteration information.
World-Record Performance Boerboels: Bred to Work, Proven to Win.