Cold River Canine Anatomy and Working Structure · Chapter 4
Boerboel Movement: What the Gait Reveals About Structure and Working Function
A stack presents the dog. Movement asks the structure to work.
By Cold River Boerboels · Updated October 28, 2026
A Boerboel can look impressive standing still. A strong head, heavy bone, substantial muscle and a carefully arranged stance can create a powerful picture. But a photograph cannot tell us everything about how that dog uses its body.
Once the dog moves, the evaluation changes. The front assembly, back, pelvis, joints and feet have to function together. We can observe coordination, consistency and the way the dog carries itself through repeated strides.
At Cold River Boerboels, our position is straightforward: a complete working dog deserves an evaluation that goes beyond the stack. Movement belongs beside hands-on assessment, appropriate health screening, temperament and evidence of function.
From the croup and stifle to the moving dog
The earlier chapters examined the croup and rear angulation, rear angulation and stifle anatomy, and the topline. This chapter brings those subjects together through movement.
A visible croup slope, pelvic orientation and stifle angle are different observations. A rear-high outline, sagging back and roached back are also different descriptions. None should become a shortcut that allows us to predict an entire dog's ability from one line in a photograph.
The next question is practical: what happens when that structure starts moving? Does the dog carry itself consistently? Do the front and rear appear coordinated? Is an unusual posture present only in the stack, or does it continue through multiple strides? These questions connect anatomical description with functional observation.
Gait, trot and movement: the terms matter
Gait means the pattern of limb movement and footfalls. A trot is one gait. In its basic pattern, the left front limb pairs with the right rear, followed by the opposite diagonal pair. A walk has a four-beat pattern; a pace pairs the limbs on the same side. Knowing which gait you are watching comes before deciding whether it looks unusual. The University of Minnesota's veterinary anatomy gait resource is useful for learning these patterns. [1]
Conformation describes the dog's physical structure. A gait abnormality describes an unusual movement pattern. Lameness concerns impaired limb use and warrants clinical assessment. Those terms should not be treated as interchangeable diagnoses.
For a breeder's first observation, “gait deviation” or “movement concern” is often more precise than declaring that a dog has a structural defect. Describe what is visible before deciding what caused it.
Original educational schematic for this chapter, based on standard diagonal-pair trot terminology. [1] Highlighting identifies paired limbs; it does not imply a fixed duty factor, exact synchrony in every stride, or absence of suspension.
Why the trot deserves attention
The trot gives the observer a repeating diagonal pattern to compare across strides. It is useful for looking at left-right consistency, front-rear coordination, limb paths and the carriage of the body. Veterinary musculoskeletal examinations commonly include both walking and trotting, with adequate space and traction. [2]
That does not make a trot a complete test of a Boerboel. A short straight-line pass cannot show every demand of turning, stopping, getting up, negotiating uneven ground or working in a harness. It is one useful observation in a larger evaluation.
Cold River's preference is to see the dog at a comfortable, sustainable pace before drawing conclusions from an impressive fast pass. Speed itself should never become the selling point. We want to understand the movement we are seeing.
What a stack can hide—and what movement adds
A skilled handler can arrange the feet, adjust the head and neck, and present an outline that makes some conformation concerns less obvious. That is one reason a stacked photograph should not carry the whole evaluation.
Once the dog moves, it must repeatedly place its own feet and carry its own body. We gain evidence that a posed image cannot supply. The useful principle is this: movement tests the impression created by the stack.
It would go too far to say that movement exposes every fault or that handling no longer matters. Lead tension, pace, excitement, surface and camera position can affect the presentation. One excellent stride is not the entire dog, and one awkward stride is not a diagnosis.
Our evaluation should therefore ask for a fair opportunity to observe: several clear passes, more than one view, a comfortable pace and minimal interference with the dog's natural carriage.
Front and rear have to work together
Zink and Schlehr's review of working-dog structure emphasizes evaluating the whole dog for its intended task. Their discussion of balanced front and rear angulation helps explain why isolated rear angulation is an incomplete selection criterion. Their illustrations also distinguish front-limb alignment from appearance alone. [3]
For a Boerboel, that gives us a useful question: do the front and rear appear to cooperate, or does the movement repeatedly look crowded or disorganized? It does not give us a universal numerical angle that guarantees soundness.
Published illustration: balanced versus imbalanced angulation in Belgian Malinois. M. R. Schlehr, in Zink & Schlehr (2020), Figure 15. [3] CC BY; reproduced without alteration. These are not Boerboel silhouettes or prescribed Boerboel joint angles.
The Cold River position is that “more” is not automatically “better.” More size, more apparent rear angulation or more dramatic reach should not win the argument without considering the entire dog and the work expected of it.
Published illustration: front-limb alignment. M. R. Schlehr, in Zink & Schlehr (2020), Figure 6. [3] CC BY; reproduced without alteration. General canine illustration, not a Boerboel diagnostic standard.
The topline is part of the movement evaluation
In a study of 60 German Shepherd Dogs, Humphries and colleagues examined how differences in back conformation related to posture and movement using motion capture and pressure measurements. Their work supports taking structural variation seriously as a biomechanical question. It does not establish Boerboel-specific thresholds or prove that a particular outline will cause disease. [4]
A separate comparison of 12 healthy German Shepherds and 12 healthy Labradors found differences in standing posture and movement, including back and hip mechanics. The authors explicitly identified the need for further investigation before linking those differences to clinical musculoskeletal problems. [5]
This is the bridge back to Chapter 3: observe the back while the dog moves, rather than judging only the outline it holds when posed. Look for a recurring pattern across strides. Allow normal movement of the body; “stable” should not be confused with completely rigid.
The UKC South African Boerboel standard makes movement central to breed evaluation. Its gait section calls for coordinated, unrestricted movement, rear propulsion, firm supporting joints and a stable topline, while treating restricted mobility seriously. This is a breed-standard expectation, distinct from a clinical diagnosis or an experimentally validated injury prediction. [6]
What an unusual gait can tell you
Your eye may correctly tell you that something deserves a closer look. What it cannot reliably tell you, by itself, is exactly which tissue or anatomical feature caused the change.
Unequal steps or an apparent reluctance to use one limb: Describe the asymmetry and seek an assessment if it persists. What it does not establish: a specific hip, elbow or ligament diagnosis.
Shortened or restricted movement: Compare repeated passes, circumstances and the dog's usual movement. What it does not establish: that one visible conformation feature is responsible.
A recurring sideways body orientation: Record whether it persists on a straight path with a relaxed lead. What it does not establish: that every sideways step represents a fixed structural fault.
Marked body roll or an inconsistent back profile: Include the whole dog and the conditions in the evaluation. What it does not establish: a diagnosis from the silhouette alone.
Repeated toe dragging, stumbling or poor coordination: Arrange veterinary evaluation rather than treating it as a cosmetic issue. What it does not establish: that the cause must be orthopedic.
The clinical reason for caution is concrete: pain, muscle or tendon injury, orthopedic disease and neurologic problems can influence gait. A proper workup combines history, gait assessment and examination, with further testing guided by the findings. [2]
Compensation can make the whole dog look different
In an experimental study of eight Beagles, Fischer and colleagues induced a temporary hindlimb lameness and measured forces under all four limbs. The dogs reduced loading of the affected hindlimb and redistributed support, including increased loading of the opposite hindlimb. Changes also involved the front limbs and stride timing. [7]
The practical lesson is that a movement change may be an adaptation to a problem elsewhere. The body part that catches your eye is not necessarily where the problem began. These were experimental Beagles, so the study should not be used to assign an exact compensation pattern to every lame Boerboel.
In a 2024 clinical study comparing 13 control dogs with 19 dogs with elbow osteoarthritis, objective gait measurements helped identify differences in limb loading. The authors noted the difficulty of evaluating dogs affected on both sides. A dog need not display an obvious one-sided limp for movement assessment to have clinical value. [8]
A good eye matters. Measurement adds information.
Experience helps an observer notice a short step, recurring asymmetry or a movement pattern that merits further examination. It is valuable to develop that eye. It is equally valuable to understand its limits.
Waxman and colleagues compared video-based subjective assessment with force-platform measurements in 24 dogs with experimentally induced lameness. Observers' assessments agreed poorly with objective limb-function measurements; experienced observers were more repeatable, which is different from being accurate against those measurements. [9]
Two terms explain what measurement adds. Kinematics describes movement, such as segment motion and joint angles. Kinetics concerns forces, including measurements from force plates or pressure systems. [8] A visually smooth stride and a measured loading pattern answer related but different questions.
For breeding judgment, the sensible response is to combine evidence. Observe the dog, use appropriate health screening and clinical assessment, and consider its history and function. Neither a ring result nor a short video replaces that wider picture.
What this means for a working Boerboel
A working Boerboel must do more than create an imposing outline. In Cold River's view, the evaluation should include how the dog starts, travels, changes direction, stops and carries itself during work appropriate to its age, health and conditioning.
A 2025 study of 27 working dogs from Labrador, shepherd and spaniel groups used motion capture, force plates and biomechanical modelling to examine trotting. The researchers found breed-related differences that were not explained completely by body-size scaling. Their findings support task- and breed-sensitive evaluation, rather than assuming all working dogs share the same mechanics. Boerboels were not included. [10]
For farm work, guarding or athletic activity, the relevant question is how the individual dog meets the actual demands of its role. A straight-line trot offers useful information; it cannot stand in for every other movement or for a history of comfortable function.
Where weight pull fits
For a program that values Boerboel weight pull, the distinction matters. An unloaded trot and a pull against external resistance are different tasks. A movement evaluation should complement documented performance, rather than being presented as a substitute for it.
Equally, a completed pull should not be described as proof of normal hips, elbows or lifelong soundness. The inference Cold River draws is that gait, appropriate health evaluation and documented working performance each contribute something useful to whole-dog judgment. The studies cited here do not establish that a particular trot predicts weight-pull capacity.
That is where the phrase performance-bred Boerboels should carry real responsibility: evaluate the complete working dog, and be precise about what each piece of evidence shows.
How to observe movement fairly
Start with ordinary movement. Observe the dog standing naturally, then walking before asking for a comfortable trot.
Use a straight, level path with good traction. Provide enough room for several natural strides. [2]
Keep interference low. Let the dog look ahead and avoid pulling its head into an artificial position.
Watch from the side, front and rear. Each view answers different questions about carriage, limb paths and consistency.
Keep the context. Retain several passes at normal speed. Slow-motion replay can help inspect a moment, but should accompany the original footage.
Record what you actually see. “Repeatedly shortens the right rear step” is more useful than an unsupported diagnosis.
This is Cold River's practical observation checklist, not a clinical test protocol. Do not exercise a painful or lame dog to make a fault more obvious; arrange an examination. Sudden lameness that shifts between legs, especially with fever or swollen joints, can be tick-borne disease. Our tick-borne disease guide for Boerboels covers the testing and treatment.
Questions Boerboel owners often ask
Does an unusual gait always mean poor structure?
No. It is an observation requiring context. The cause may involve structure, discomfort, injury, neurologic function or the conditions under which the dog is moving. [2]
Can a dog move well and still have a health problem?
Yes. Visual gait assessment has limits, particularly when changes are subtle or affect more than one limb. A good-looking pass should not replace appropriate screening or an examination when there is a concern. [8,9]
Does a dramatic stride prove better working ability?
No. Cold River's selection preference is coordinated movement suited to the dog and its role. An impressive presentation is one observation; working ability requires evidence appropriate to the task.
Can a stack replace seeing the dog move?
No. They provide different information. A fair assessment should include natural standing posture and movement, rather than allowing the most flattering still image to become the entire evaluation.
The Cold River standard
At Cold River Boerboels, our standard is whole-dog breeding judgment: evaluate from the front assembly, across the topline, through the rear and down to the ground, then watch those parts function together.
For anyone researching Boerboel structure, Boerboel movement or working Boerboels, that is the principle we want this series to reinforce. Respect the breed's strength and presence. Ask how the dog uses its body. Use research honestly, and keep observation, interpretation and diagnosis distinct.
The stack gives us a picture. Movement gives us more evidence. The complete dog deserves both.
Continue the series
For a closer look at the structures behind front reach and placement, continue to Chapter 5: Boerboel front assembly and shoulder angulation.
For the contact point underneath every stride, read our chapter on Boerboel feet, pasterns and nail care.
Read Chapter 1: the croup and rear angulation, Chapter 2: rear angulation and stifle anatomy and Chapter 3: Boerboel topline and rear-high structure. For the work this structure has to do, see our dog weight pulling guide, 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
Scientific evidence is identified below by study type. Application to Cold River's breeding philosophy is editorial interpretation. None of these studies establishes Boerboel-specific gait cutoffs or a gait-based predictor of weight-pull performance.
Datt VL & Fletcher TF. Gaits. University of Minnesota College of Veterinary Medicine. Veterinary anatomy teaching resource with gait animations.
Jaffe MH. Diagnosis and Treatment of Musculoskeletal Disorders in Animals. Merck Veterinary Manual. Reviewed October 2025; updated July 2026. Clinical reference.
Zink C, Schlehr MR. Working Dog Structure: Evaluation and Relationship to Function. Frontiers in Veterinary Science. 2020;7:559055. Review; structural guidance, not a prospective Boerboel injury study.
Humphries A, Shaheen AF, Gómez Álvarez CB. Different conformations of the German shepherd dog breed affect its posture and movement. Scientific Reports. 2020;10:16924. Observational biomechanics study, 60 German Shepherd Dogs; breed-specific extrapolation requires care.
Humphries A, Shaheen AF, Gómez Álvarez CB. Biomechanical comparison of standing posture and during trot between German shepherd and Labrador retriever dogs. PLOS ONE. 2020;15(10):e0239832. Comparative study, 12 dogs per breed.
United Kennel Club. South African Boerboel breed standard, Gait section. Registry standard, not a research paper.
Fischer S, Anders A, Nolte I, Schilling N. Compensatory load redistribution in walking and trotting dogs with hind limb lameness. Veterinary Journal. 2013;197(3):746–752. Experimentally induced reversible lameness in eight Beagles.
Kjörk Granström M, Roepstorff L, Pettersson K, Ljungvall I, Dimopoulou M, Bergström A. Evaluation of forelimb gait variation overground at a walk in sound and lame dogs using a combination of diagnostic techniques. Acta Veterinaria Scandinavica. 2024;66:25. Clinical study: 13 controls and 19 dogs with elbow osteoarthritis.
Waxman AS, Robinson DA, Evans RB, Hulse DA, Innes JF, Conzemius MG. Relationship Between Objective and Subjective Assessment of Limb Function in Normal Dogs with an Experimentally Induced Lameness. Veterinary Surgery. 2008;37(3):241–246. Blinded observer comparison in 24 dogs.
Charles JP et al. The biomechanics of working dog locomotion I: Steady-state trotting. Journal of Experimental Biology. 2025;228(17):jeb250523. Comparative biomechanics in 27 working dogs; no Boerboels.
Illustration credits and further published figures
The two reproduced drawings are by M. R. Schlehr, from Zink & Schlehr (2020), Figures 6 and 15, published in Frontiers in Veterinary Science under Creative Commons Attribution. Credit: © 2020 Zink and Schlehr. Drawings are unaltered; the surrounding captions are new. Original article and figure captions.
Another useful published diagram is Humphries et al. (2020), PLOS ONE, Figure 1: marker positions used to calculate joint rotations. Figure 6 in that paper shows back-angle measurements. Both are published under CC BY. Their angles are study definitions, not ideal Boerboel angles.
World-Record Performance Boerboels: Bred to Work, Proven to Win.