Dogs with hip dysplasia typically show a combination of hind-end stiffness, reluctance to jump or climb, a swaying “bunny-hop” gait, and difficulty rising after rest. These signs can appear as early as a few months of age in growing puppies or may not become obvious until middle age, when arthritis compounds the underlying joint looseness. What makes hip dysplasia tricky is that the severity of what you see does not always match the severity of what the joint looks like on an X-ray, and some dogs compensate so well that owners miss the problem for years.
How Hip Dysplasia Develops
Dogs affected by hip dysplasia are born with structurally normal hips, but the ball-and-socket joint of the hip quickly develops abnormal looseness (called laxity), allowing the femoral head to partially slip out of the socket. Over time, that repeated micro-movement wears down cartilage and triggers degenerative joint disease, which is essentially arthritis.1PubMed Central. The pathogenesis and diagnosis of canine hip dysplasia: a review The condition is the most common inherited orthopedic problem in dogs, driven by multiple genes interacting with environmental factors like diet and body weight.2PubMed Central. Emerging insights into the genetic basis of canine hip dysplasia
Because the joint starts out normal and degrades over time, there are really two windows when signs become noticeable. The first is during rapid growth, usually between four and twelve months of age, when the soft tissues around the hip cannot keep up with how fast the skeleton is growing. The second is in adulthood, often after age two, when accumulated cartilage damage finally produces enough inflammation and pain to change how the dog moves.
What You Will Actually See at Home
The hallmark signs of hip dysplasia are changes in how your dog moves, rests, and plays. Early in the disease, the changes can be subtle enough that you might chalk them up to the dog being tired or getting older. As it progresses, the signs become harder to miss.
- Bunny-hopping: Instead of moving each hind leg independently, the dog pushes off with both hind legs at once, especially going upstairs or accelerating into a run. This reduces the range of motion each hip has to produce.
- Trouble rising: Stiffness after naps or long rest periods is one of the earliest signs owners notice. The dog may take several attempts to stand, or you might hear a groan as they shift their weight.
- Reluctance to jump: A dog that used to leap onto the couch or into the car suddenly hesitates, waits for a boost, or refuses entirely.
- Swaying rear end: A visibly loose, side-to-side sway of the hips during walking is characteristic. Some owners describe their dog as looking “wobbly” from behind.
- Narrowed stance: Dogs may bring their hind legs closer together than normal to shift weight toward the front end, which is more comfortable for sore hips.
- Reduced muscle mass: Over weeks to months, the thigh muscles on one or both sides can visibly shrink because the dog is using those legs less. The shoulders may look more muscular by comparison, since the front end picks up the slack.
- Clicking or popping: In some dogs, you can hear or feel a click when the hip moves, reflecting the femoral head sliding partially in and out of the socket.
Gait analysis research has confirmed what owners observe at home. Dogs with hip dysplasia tend to take longer strides but push off with less force through their hind legs compared to healthy dogs, while overall walking speed stays roughly the same.3American Journal of Veterinary Research. Kinematic gait analysis in dogs with hip dysplasia In other words, the dog adjusts its movement strategy to avoid loading the sore joint hard, even if it does not look obviously lame to the untrained eye.
Signs in Puppies Versus Adult Dogs
In puppies and adolescent dogs, the picture often looks different from what you see in older adults. A young dog in rapid growth may show sudden-onset lameness, a reluctance to exercise for long periods, or a tendency to sit with their legs splayed out to the side rather than tucked underneath. Some puppies seem fine at the start of a walk and then become progressively more reluctant as the outing continues. Because young dogs have not yet developed significant arthritis, their pain is primarily from the joint being loose and inflamed rather than from chronic cartilage loss. This means their signs can actually fluctuate: good days followed by bad ones, with flare-ups after heavy play.
Adult dogs with hip dysplasia, especially those over about five years old, tend to show a more consistent pattern of stiffness and declining activity levels. The arthritis that develops secondary to joint laxity becomes the dominant source of pain. Morning stiffness that improves after a few minutes of moving is a classic presentation. Over time, you may notice your dog shifting how it sits (leaning to one side, or doing a “lazy sit” with one leg kicked out), losing enthusiasm for walks, or becoming reluctant to squat fully to defecate.
Behavioral Changes You Might Not Connect to Hip Pain
Not all signs of hip dysplasia are physical. Chronic pain changes behavior in ways that owners sometimes misinterpret as personality shifts or aging. A study of dogs with pain-related aggression found that hip dysplasia was the most common underlying cause, accounting for about two-thirds of cases. Dogs that had never been aggressive before the onset of pain were more likely to show impulsive, defensive aggression when handled, especially when someone touched or manipulated their hind end.4Journal of Veterinary Behavior. Pain-related aggression in dogs: 12 clinical cases
Other behavioral signals include restlessness at night (the dog cannot get comfortable), whimpering or panting without an obvious cause, reluctance to be groomed or toweled around the hips, and a general decline in playfulness. Some dogs become clingy or withdrawn. If your previously easygoing dog suddenly snaps when you pet its lower back or hips, pain should be high on the list of explanations.
Which Breeds Are Most at Risk
Hip dysplasia is most common in large and giant breeds, though it can occur in dogs of any size.5PubMed. Etiopathogenesis of Canine Hip Dysplasia, Prevalence, and Genetics A large demographic study of dogs in the United States and Canada found striking breed-to-breed variation. At the high end, Bulldogs had a prevalence approaching 78%, while Italian Greyhounds were essentially at zero.6PubMed Central. The Demographics of Canine Hip Dysplasia in the United States and Canada German Shepherds, Labrador Retrievers, Golden Retrievers, Rottweilers, Saint Bernards, and Great Danes are among the breeds most commonly diagnosed. Smaller breeds like Pugs and French Bulldogs also appear at elevated rates, likely reflecting their heavy, compact body structure relative to their frame.
Being a high-risk breed does not guarantee your dog will develop the condition. And being a low-risk breed does not make it impossible. The genetics are polygenic, meaning many genes contribute small effects, and environment plays a real role in whether a genetically susceptible dog actually develops clinical signs.2PubMed Central. Emerging insights into the genetic basis of canine hip dysplasia
How Diet and Growth Rate Affect the Hips
One of the strongest environmental risk factors is overfeeding during puppyhood. Research has consistently shown that rapid weight gain, high caloric intake, and excessive calcium or vitamin D supplementation increase both the frequency and severity of hip dysplasia in genetically predisposed dogs.1PubMed Central. The pathogenesis and diagnosis of canine hip dysplasia: a review In experimental studies, dogs that gained weight quickly due to unrestricted feeding developed dysplasia earlier and more severely than litter-matched dogs on restricted diets, even when starting hip laxity was similar.7PubMed. Nutrition, weight gain and development of hip dysplasia. An experimental investigation in growing dogs with special reference to the effect of feeding intensity
The practical implication is straightforward: large-breed puppies should be fed a controlled amount of a diet formulated for large-breed growth, not free-fed from an open bowl. The goal during growth is a lean, ribby body condition. You should be able to feel your puppy’s ribs and the ridges of the spine easily, without them being visually prominent.1PubMed Central. The pathogenesis and diagnosis of canine hip dysplasia: a review Avoiding calcium supplements on top of a complete commercial diet is equally important, since excess calcium has been specifically linked to abnormal skeletal development.8PubMed. The role of nutrition in canine hip dysplasia
How Veterinarians Confirm the Diagnosis
If you bring your dog in with the signs described above, your vet will start with a physical exam that includes manipulating the hip joints while the dog is sedated or deeply relaxed. The most well-known hands-on test is the Ortolani maneuver: the vet pushes the femur upward to subluxate the hip and then abducts the leg outward, feeling for a “clunk” as the femoral head drops back into the socket. A positive Ortolani sign indicates joint laxity. Research in Rottweilers has confirmed that the Ortolani test correlates well with formal radiographic hip scores, making it a useful early screening tool.9PubMed Central. Early Diagnosis of Canine Hip Laxity: Correlation between Clinical Orthopedic Examinations and the FCI Scoring Method in a Closed Cohort of Rottweilers A negative Ortolani sign, on the other hand, is a strong predictor that arthritis will not develop by age two.10PubMed. Palpation and dorsal acetabular rim radiographic projection for early detection of canine hip dysplasia: a prospective study
Radiographs (X-rays) remain the standard for formal diagnosis and screening. The two major systems in North America are the OFA (Orthopedic Foundation for Animals) method, which uses a single hip-extended view and grades hips from excellent to severe, and the PennHIP method, which measures how far the femoral head can be distracted from the socket (the distraction index). These two systems do not always agree. One study found that about 80% of dogs rated as having fair to excellent hips by OFA standards still had significant passive laxity when measured with the PennHIP distraction method.11PubMed. Evaluation of the relationship between Orthopedic Foundation for Animals’ hip joint scores and PennHIP distraction index values in dogs That discrepancy matters because dogs with hidden laxity can still develop arthritis and pass susceptibility to offspring. If you are buying a puppy from a breeder, asking about PennHIP scores in addition to OFA ratings gives a more complete picture of the parents’ joint health.
The Disconnect Between X-Rays and Symptoms
One of the most confusing aspects of hip dysplasia for owners is that a dog’s X-rays and its behavior at home can tell very different stories. Some dogs with radiographically severe dysplasia manage surprisingly well, running and playing with little apparent discomfort. Others with only mild changes on X-ray are clearly in pain. This disconnect reflects individual differences in pain tolerance, muscle mass (strong muscles stabilize a loose joint), body weight, and activity level. It is also why researchers have noted that all hip dysplasia phenotypes tend to be treated as a single condition, despite recognized differences in how the disease expresses itself and responds to treatment.
For you as an owner, the practical takeaway is that your dog’s comfort and mobility matter more than the radiographic grade. A dog graded as “moderate” on X-ray but moving well and happy may need less intervention than a dog graded as “mild” but clearly struggling. Your vet will usually treat the dog, not the radiograph.
Managing Hip Dysplasia Without Surgery
Many dogs with hip dysplasia live comfortably with non-surgical management, especially if the disease is caught before severe arthritis sets in. Weight management stands out as the single most effective and consistently supported component. Keeping a dysplastic dog lean reduces the mechanical load on already compromised joints, and evidence reviews have identified it as a genuinely effective strategy for managing both hip dysplasia and the arthritis that follows.12PubMed. Canine hip dysplasia: reviewing the evidence for nonsurgical management
Beyond weight control, the non-surgical toolkit typically includes anti-inflammatory pain medications (NSAIDs prescribed by your vet), joint supplements such as glucosamine and omega-3 fatty acids, controlled low-impact exercise, and environmental modifications like ramps and non-slip flooring. A long-term follow-up of 74 dogs managed without surgery found that outcomes were mixed: depending on the measure used, somewhere between 40% and 66% of dogs remained clinically affected by their owners’ assessment, and veterinary exams detected hip osteoarthritis in the majority.13PubMed. Retrospective evaluation of the long-term outcome of non-surgical management of 74 dogs with clinical hip dysplasia Non-surgical management controls the problem but does not cure it. Regular reassessment with your vet is part of the deal.
When Surgery Becomes the Better Option
Surgical options depend largely on the dog’s age, body size, and how much arthritis has already developed. Young dogs with significant laxity but minimal arthritis may be candidates for procedures that reshape the pelvis to better cover the femoral head, with triple pelvic osteotomy being the best known. Juvenile pubic symphysiodesis is an even earlier intervention, performed in very young puppies identified as high-risk, that alters pelvic growth to improve hip coverage.
For dogs with established, painful arthritis that no longer responds adequately to medical management, the two main surgical options are femoral head and neck excision (removing the ball of the joint entirely, allowing a fibrous false joint to form) and total hip replacement. Total hip replacement is the closest thing to a true fix, restoring near-normal function in most cases, but it is expensive and requires specialized surgical facilities. Femoral head excision is less costly and works best in smaller dogs, where the false joint can more easily bear the body’s weight. Your vet or a veterinary orthopedic surgeon can help you weigh which option fits your dog’s size, activity level, and disease stage.
Hydrotherapy and Physical Rehabilitation
Rehabilitation therapies have become increasingly popular for dysplastic dogs, and there is growing evidence to support at least some of them. A clinical trial comparing underwater treadmill exercise and low-level laser therapy found that both approaches improved chronic pain scores and locomotor function in dogs with hip dysplasia.14Revue Vétérinaire Clinique. Effects of hydrotherapy and low-level laser therapy in canine hip dysplasia: A randomized, prospective, blinded clinical study The water’s buoyancy reduces joint loading while still allowing the muscles to work, which helps maintain or rebuild the thigh muscle mass that stabilizes the hip. Many rehabilitation centers also use therapeutic exercises on balance boards, cavaletti rails, and incline surfaces to target specific muscle groups.
These therapies are generally used alongside medical management rather than replacing it. They tend to work best for dogs that are not surgical candidates or as post-operative rehabilitation after procedures like total hip replacement. The evidence base is still building, but the direction of the available research is positive, and many owners report visible improvements in their dogs’ willingness to move and overall comfort.
Screening If You Are Choosing a Puppy
If you are buying a large-breed puppy, the parents’ hip screening results are one of the most important pieces of health information you can ask a breeder about. Both the OFA and PennHIP systems provide screening, and responsible breeders will have results available for both parents. As noted earlier, OFA’s standard hip-extended radiograph can underestimate laxity, so PennHIP distraction index results add valuable information.11PubMed. Evaluation of the relationship between Orthopedic Foundation for Animals’ hip joint scores and PennHIP distraction index values in dogs A lower distraction index means tighter hips and less risk for the offspring.
Even with excellent parental scores, there is no guarantee a puppy will be free of dysplasia. The polygenic inheritance and environmental influence mean that good breeding reduces risk substantially but cannot eliminate it. Once you bring a large-breed puppy home, the controllable factors are diet (lean body condition, appropriate large-breed puppy food, no calcium supplements) and exercise (moderate activity on soft surfaces rather than repetitive high-impact exercise like jumping for frisbees on hard ground during the rapid-growth phase). These steps will not prevent hip dysplasia in every genetically susceptible dog, but they give the developing joints the best chance to form properly.