The most common signs of hip dysplasia in dogs are a “bunny-hopping” gait, difficulty standing up, reluctance to jump or climb stairs, and lameness after exercise. Some signs appear as early as four months old, while others develop gradually over years as the joint deteriorates. Knowing what to look for at each stage helps you catch the condition before it causes serious joint damage.
What’s Happening Inside the Joint
Hip dysplasia starts with a mismatch between how fast a puppy’s bones grow and how much muscle mass supports the hip joint. When the muscles can’t keep the ball-and-socket joint stable, the femoral head (the “ball” at the top of the thigh bone) fits loosely in its socket. That looseness causes the joint surfaces to grind against each other with every step, gradually wearing down cartilage and triggering the body to build bone spurs as a flawed attempt at repair. Over time, this cycle of damage and remodeling leads to chronic arthritis.
This is why two dogs with the same degree of joint looseness can look very different. One might show obvious lameness at six months, while another compensates well into adulthood before the accumulated arthritis finally outpaces the body’s ability to cope.
Early Signs in Puppies and Young Dogs
In puppies between four and twelve months old, the earliest clue is often how they move rather than any obvious pain. A bunny-hopping gait, where both back legs push off the ground together instead of alternating, is one of the hallmark signs. You’ll notice it most clearly when your dog climbs stairs or picks up speed on a run. Puppies with hip dysplasia also tend to be less active than their littermates, and owners frequently describe them as “lazy” before realizing something is wrong.
Other early signs include:
- Trouble standing up after lying down, especially on hard floors
- Reluctance to jump onto furniture, into cars, or over obstacles
- Lameness after exercise that seems to improve with rest
- A swaying or wobbly back end during walks
- Reluctance to walk on slippery surfaces like tile or hardwood, where an unstable hip feels even less secure
Some puppies also make a clicking or popping sound from the hip area during movement. This can indicate the femoral head shifting in and out of the socket. It’s not always audible, but if you hear it, it’s worth having your vet check.
How Signs Change in Adult Dogs
As dogs reach two to three years old and beyond, the signs shift from joint looseness to the consequences of arthritis. Lameness may become more persistent rather than just showing up after hard exercise. Many dogs develop a noticeably shortened stride in the back legs and start shifting more weight onto their front limbs. You might notice your dog’s shoulders and front legs looking more muscular over time, while the thigh muscles on one or both back legs visibly shrink. That muscle loss, called atrophy, happens because the dog is unloading weight from the painful hip.
Stiffness tends to be worst after rest. A dog that limps heavily for the first few minutes of a walk but “warms out of it” is showing a classic pattern of arthritic joints loosening up with movement. In advanced cases, the range of motion in the hip decreases enough that the dog can no longer sit squarely. Instead, they’ll kick one or both legs out to the side in what’s sometimes called a “lazy sit” or “puppy sit.”
Behavioral Changes You Might Miss
Not every sign of hip dysplasia looks like limping. Chronic hip pain can change a dog’s personality and behavior in ways that seem unrelated to a physical problem. Dogs in pain often become clingy, seeking more contact with their owners as a comfort-seeking behavior. Others go the opposite direction, becoming irritable or snapping when touched, particularly around the hips and lower back.
Sudden aggression or reactivity that seems out of character can be a pain response. A dog that growls when a child approaches, or snaps when picked up, may be protecting a sore joint rather than developing a behavioral issue. Research in veterinary behavioral science has linked chronic musculoskeletal pain to increased impulsivity, heightened anxiety, and generalized aggression that extends beyond the specific trigger.
Other subtle indicators include restlessness and an inability to settle, changes in sleeping patterns (either sleeping far more than usual or struggling to get comfortable), seeking out cold or hard surfaces to lie on, and out-of-context behaviors like lip-licking or yawning during position changes. If your dog pants heavily at rest or startles more easily at noises, pain may be lowering their overall stress threshold.
Which Breeds Are Most Affected
Hip dysplasia can occur in any breed, but large and giant breeds carry the highest risk. According to the Orthopedic Foundation for Animals database, Bulldogs have the highest rate at 70.9% of evaluated dogs showing dysplasia. German Shepherds come in at 20.4%, which is still substantial given that over 146,000 dogs of that breed have been evaluated.
The good news is that selective breeding programs are working. A Swiss study tracking five popular breeds over two decades found significant drops in hip dysplasia rates. Golden Retrievers went from 25.3% affected in the late 1990s down to 9.4% by 2010 to 2016. Labrador Retrievers dropped from 16.5% to just 2.9% over the same period. German Shepherds saw the most dramatic improvement, falling from 46.2% to 18.0%. These declines came from screening breeding dogs with X-rays and only breeding those with healthy hips.
Small breeds can develop hip dysplasia too, though it’s less common and often goes undiagnosed because the dog is light enough to compensate without obvious lameness.
How Hip Dysplasia Is Diagnosed
A veterinarian typically starts with a physical exam, manipulating the hip joint to check for looseness, pain, grinding sensations, and reduced range of motion. Bone-on-bone rubbing or the presence of bone spurs can sometimes be felt during this hands-on assessment.
X-rays are the standard for confirming the diagnosis. The OFA accepts preliminary X-rays on puppies as young as four months old to evaluate hip conformation. However, a preliminary rating of “fair” or “mild” should be followed up with a repeat evaluation at 24 months, when the skeleton is fully mature and the results are more reliable. The X-ray shows how well the femoral head sits in the socket, whether the joint space is widened (indicating looseness), and whether bone spurs or other arthritic changes have already formed.
PennHIP is an alternative screening method that specifically measures joint looseness and can be performed at a younger age, giving breeders and owners earlier information about a dog’s risk. Both methods are useful, but they measure slightly different things: OFA grading focuses on the overall appearance of the joint, while PennHIP quantifies how much the ball can be displaced from the socket.
What the Signs Mean for Your Dog’s Daily Life
Hip dysplasia is a spectrum. Some dogs have mild looseness that never progresses to significant arthritis, especially with weight management and appropriate exercise. Others develop painful arthritis that limits their mobility by middle age. The signs you observe at home are the single most important guide to how your dog is actually doing, because X-ray findings don’t always match the level of pain or disability a dog experiences. A dog with terrible-looking X-rays may function well, while one with mild radiographic changes might be in significant discomfort.
Paying attention to how your dog moves after rest, how they handle stairs, whether their muscle mass looks symmetrical, and whether their behavior or temperament has shifted gives you the clearest picture of whether the condition is stable or progressing. Tracking these signs over weeks and months, rather than relying on a single observation, is the most practical way to stay ahead of the disease.