There is something particularly deceptive about hip dysplasia in dogs.
A puppy can race around the yard, leap after a ball and appear completely normal while an abnormal process is already developing inside its hips.
Then, sometimes years later, the owner notices something seemingly insignificant.
The dog hesitates before jumping into the car.
It takes longer to get up.
Perhaps it develops a slight limp after a long walk—or begins running with a peculiar “bunny-hop.”
What may look like a simple consequence of getting older can actually be the result of a developmental problem that began much earlier.
Canine hip dysplasia isn’t simply an “old dog disease.” It is a complex condition involving abnormal development and instability of the hip joint that can eventually produce osteoarthritis and chronic pain. Although large and giant breeds are particularly susceptible, dogs of many sizes and breeds can be affected.
And there is considerably more to the story than genetics.
What exactly is hip dysplasia in dogs?
Think of a healthy hip as a beautifully engineered ball-and-socket joint.
The rounded head of the femur fits snugly into the acetabulum, the socket in the pelvis. The joint is stabilized by surrounding muscles, ligaments, connective tissue and the shape of the bones themselves.
In a dog with hip dysplasia, that relationship can be too loose or poorly aligned.
The resulting hip joint laxity allows abnormal movement between the femoral head and socket.
Over time, that abnormal movement can damage the joint and trigger changes associated with osteoarthritis—including bone remodeling, inflammation, thickening of the joint capsule and formation of bone spurs.
In other words:
Hip dysplasia can start with instability and end with arthritis.
But the journey from one to the other isn’t identical in every dog.
The surprising part: a dog can have hip dysplasia without looking sick
One of the most important things for owners to understand is that the severity of hip abnormalities seen on an X-ray doesn’t necessarily correspond perfectly with how uncomfortable a dog appears.
Some dogs with significant radiographic abnormalities can remain surprisingly active, while others with apparently less dramatic changes may develop obvious pain or mobility problems.
That’s one reason relying solely on the appearance of your dog’s gait can be misleading.
Dogs are also remarkably good at adapting.
Instead of announcing, “My hips hurt,” a dog may:
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stop jumping onto furniture
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avoid stairs
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lie down more frequently
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become reluctant to play
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take longer to get up
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shift its weight toward the front legs
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develop stiffness after resting
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lose muscle over the hindquarters
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become less enthusiastic about walks
None of these signs necessarily screams hip dysplasia.
Together, however, they deserve attention.
The famous “bunny hop” isn’t the only warning sign
The classic image of a dog with hip dysplasia is one running with both hind legs moving together in a hopping motion.
And yes, a bunny-hopping gait can occur.
But it isn’t compulsory.
Other signs can include hind-limb lameness, difficulty rising, reduced activity, stiffness, reluctance to jump and decreased muscle mass in the rear legs. Some dogs may also sway through the hips while walking or shift more weight onto their forelimbs.
Perhaps more importantly, symptoms can vary dramatically with age and the development of secondary arthritis.
A young dog may show discomfort associated with an unstable hip.
An older dog may be suffering primarily from osteoarthritis that has developed because of that instability.
The original problem and the current problem aren’t necessarily the same thing.
It’s genetic—but genes aren’t destiny
Hip dysplasia has a polygenic, multifactorial basis.
That’s a complicated way of saying that many genes can contribute to susceptibility, while environmental factors can influence how strongly the condition expresses itself.
Estimates of heritability vary considerably between breeds and studies, but genetics clearly plays an important role.
This creates an important distinction:
A puppy doesn’t inherit “hip dysplasia” in the same simple way it might inherit a single-gene disorder.
Instead, it can inherit a predisposition.
That is one reason responsible breeding programs use hip screening and careful selection of breeding animals—but also why even dogs from apparently good lines aren’t guaranteed to have perfect hips.
Lesser-known fact #1: Small dogs can get hip dysplasia too
Because hip dysplasia is strongly associated with large and giant breeds, it’s easy to assume that small dogs are effectively protected.
They aren’t.
The condition can occur in dogs of essentially all breeds and sizes, although its frequency varies substantially. Large-bodied dogs are particularly represented among affected populations.
So if your 12-pound companion develops stiffness or reluctance to jump, don’t automatically blame it on something other than the hips.
Lesser-known fact #2: Puppy calories can influence the future of the hips
This is one of the most important and frequently overlooked aspects of canine hip health.
Overfeeding a genetically susceptible puppy doesn’t necessarily create the genetic predisposition, but it can influence how severely that predisposition is expressed.
Rapid growth and excessive caloric intake can increase the stresses placed on developing joints. Research has shown that controlling food intake in growing dogs at risk of hip dysplasia can reduce the development of hip osteoarthritis.
That doesn’t mean starving a puppy.
It means avoiding the tempting idea that a large-breed puppy should be made as big as possible as quickly as possible.
For puppies genetically predisposed to joint disease, steady, controlled growth is preferable to rapid weight gain.
Bigger isn’t necessarily better
This is particularly relevant to owners of large-breed puppies.
A puppy may look adorably chunky, but excess body weight means additional mechanical load on developing joints.
Cornell’s veterinary guidance recommends avoiding overfeeding, using appropriately formulated large-breed puppy diets and avoiding unnecessary calcium and vitamin D supplementation in growing puppies.
And there is a lesson here that applies throughout a dog’s life:
Keeping a dog lean is one of the simplest things an owner can do to reduce unnecessary stress on vulnerable joints.
Lesser-known fact #3: You can’t “exercise away” hip dysplasia—but inactivity isn’t the answer either
Exercise gets surprisingly complicated when hip dysplasia enters the conversation.
Too much high-impact activity can aggravate painful joints, particularly during development or when osteoarthritis is already present.
But complete inactivity isn’t a solution.
Strong muscles around the hip can help support and stabilize an unstable joint. Controlled exercise can also maintain mobility, muscle mass and cardiovascular fitness. The Orthopedic Foundation for Animals specifically recommends adjusting exercise to the individual dog’s tolerance, gradually increasing activity while avoiding pain and inflammation.
For some dogs, activities such as swimming can be particularly useful because they allow muscular exercise without the same weight-bearing forces associated with running.
The goal isn’t:
“Exercise as much as possible.”
Nor is it:
“Don’t exercise.”
It’s:
“Find the amount and type of exercise your dog’s hips can comfortably tolerate.”
And then there’s the stairs question...
Here’s a particularly intriguing piece of research.
One study cited by the Merck Veterinary Manual found an increased risk of developing a dysplastic phenotype among puppies allowed to use stairs at or before three months of age. The same discussion noted potentially lower radiographic evidence of dysplasia among puppies allowed off-leash before three months and among dogs raised on farms or born during spring and summer.
These findings shouldn’t be interpreted as proof that a few trips down the stairs will “cause” hip dysplasia.
Hip dysplasia is far too complicated for that.
Rather, they illustrate something important:
The developing puppy’s environment can influence the expression of an underlying susceptibility.
That is very different from saying that lifestyle alone causes the disease.
Lesser-known fact #4: Hip dysplasia may already be detectable in a very young puppy
Waiting until a dog is older isn’t always necessary.
Specialized techniques such as PennHIP can assess hip laxity in young dogs and can help estimate the risk of developing hip dysplasia and osteoarthritis later in life.
That’s potentially important because some hip-preserving procedures are most useful while a dog is still growing and before substantial arthritic changes develop.
For example, juvenile pubic symphysiodesis (JPS) is an early intervention that may be considered in appropriately selected young dogs. Other procedures, such as double or triple pelvic osteotomy, are also time-sensitive and are intended to improve joint mechanics before advanced degenerative changes occur.
So if you own a puppy from a high-risk breed or with concerning signs, early veterinary assessment can matter enormously.
An X-ray doesn’t tell the whole story
Standard radiographs are important for evaluating the hip joints, particularly when arthritis has developed.
But there isn’t one universally perfect imaging method for every purpose.
The PennHIP technique focuses on measuring hip laxity, whereas traditional radiographic assessment can be used to evaluate the structure of the joint and the presence or severity of degenerative changes.
This distinction is worth remembering:
A dog can have hip laxity before it has obvious radiographic arthritis.
That’s one reason early screening can provide information that a later X-ray cannot.
What happens if your dog already has hip dysplasia?
The good news is that a diagnosis doesn’t automatically mean a miserable future.
In fact, many dogs with hip dysplasia can enjoy a good quality of life with appropriate management.
Treatment depends on the dog’s age, weight, severity of joint damage, level of discomfort, activity requirements and overall health.
Conservative management may include:
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weight management
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controlled exercise
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physical rehabilitation
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hydrotherapy
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pain-relieving medication prescribed by a veterinarian
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appropriate nutritional strategies
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environmental modifications
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orthopedic bedding
For some dogs, surgery may provide a better outcome.
Procedures range from joint-preserving operations in young dogs to femoral head and neck excision or total hip replacement in appropriately selected patients.
The important point is that there isn’t one universal treatment for hip dysplasia.
Two dogs with the same diagnosis can have very different needs.
Lesser-known fact #5: Hip dysplasia can affect both hips—but not always equally
Hip dysplasia is often bilateral, but the two hips don’t necessarily have identical levels of abnormality.
One hip may be considerably worse than the other.
That can make the clinical picture confusing because a dog may compensate remarkably well for quite some time.
And compensation itself can alter how a dog moves.
A dog experiencing discomfort behind may shift weight toward its front limbs, potentially making what looks like a “front-end” problem actually related to the hips. Cornell specifically identifies weight shifting toward the forelimbs as one possible sign.
The bottom line
Hip dysplasia in dogs is a genetic and developmental problem influenced by much more than genetics alone.
You can’t choose your puppy’s genes after birth.
But you can influence growth, nutrition, body condition, exercise and how quickly potential problems are investigated.
Perhaps most importantly, don’t assume that a young dog who looks perfectly healthy has perfect hips.
And don’t assume that an older dog who has become slower is simply “getting old.”
Sometimes the first visible sign of a problem that began during puppyhood is simply a dog who pauses before jumping into the car.
That pause may be telling you something.
Listen to it.
