Hip dysplasia in dogs: signs, hip scores and treatment

Hip dysplasia is abnormal development of the ball-and-socket hip joint. The joint becomes loose or poorly fitted, which can lead to wear, inflammation and osteoarthritis over time.

It is a developmental condition rather than a simple injury. One or both hips may be affected, and the changes seen on an X-ray do not always match how painful or mobile a dog appears. [1]

Hip dysplasia begins while a young dog's hips are developing. Looseness or instability allows the ball of the thigh bone to move abnormally within the socket, placing uneven stress on the joint.

Repeated abnormal movement can gradually alter bone, cartilage and the joint capsule. This remodelling may produce osteoarthritis, stiffness and pain, although the speed and clinical effect differ greatly between dogs. [1]

Genes are an important part of canine hip dysplasia, but they are not the whole explanation. It is a complex condition influenced by many genes together with environmental and mechanical factors during growth.

This is why hip screening can reduce breeding risk without predicting every puppy perfectly. Growth rate, nutrition, body condition and activity can influence how an inherited tendency is expressed, but no single factor explains every case. [2]

Yes. Hip dysplasia is seen most often in larger breeds, but small dogs and crossbreeds can also be affected. Breed size changes likelihood; it does not create an absolute boundary.

A dog's gait, comfort and veterinary findings matter more than an assumption based only on breed. The BVA screening scheme is open to all dogs, including dogs that are not registered with the Royal Kennel Club. [1]

Puppies are generally not described as being born with already deformed dysplastic hips. The problem emerges as the hip develops and the puppy grows and becomes active.

Early joint looseness and abnormal loading can start a cycle of wear and remodelling before an owner sees obvious signs. A puppy that runs and plays normally can therefore still have developing hip changes. [3]

There is no guaranteed way to prevent every case of canine hip dysplasia. Responsible breeding choices and appropriate care during growth can reduce risk, but this complex condition cannot be controlled by one test, food or exercise rule.

Even puppies from parents with good hip scores can receive a poor score. Screening provides useful risk information for breeding populations; it is not a promise about an individual puppy's hips or future comfort. [4]

A young dog with hip dysplasia may become lame after exercise, move stiffly, resist some activities or use both hind legs together in a bunny-hopping gait. Signs can be mild or intermittent.

Some young dogs show discomfort from hip looseness before much arthritis has developed, while others show no obvious problem. These signs are not unique to hip dysplasia, so veterinary assessment is needed to identify their cause. [1]

An adult dog may show stiffness after rest, reduced stamina, difficulty rising or jumping, hind-limb lameness, muscle loss around the back legs or reluctance to exercise. Pain may look like changed behaviour rather than crying out.

In older dogs, these problems often reflect osteoarthritis that developed after years of abnormal hip movement. Their severity varies, and another joint, muscle or spinal condition can produce a similar change in mobility. [3]

Yes. A dog can have hip changes on an X-ray while appearing comfortable and active, because radiographic abnormalities do not always match pain or day-to-day function.

Dogs also express discomfort differently, and gradual changes can be easy to miss. A screening score describes hip appearance for breeding purposes; a vet assesses the individual dog's comfort, movement and clinical needs separately. [1]

No. A bunny-hopping gait can occur with hip dysplasia, but seeing it does not confirm the condition. It is one possible movement change rather than a diagnosis.

A vet interprets the gait alongside the dog's age, history, physical examination and, when appropriate, imaging. Other orthopaedic or neurological problems can affect the hind limbs, so the cause cannot be identified from one sign alone. [1]

Yes. Hip dysplasia can affect one or both hips, and the amount of change can differ between the right and left sides. A dog may compensate, making the imbalance less obvious at home.

The BVA certificate records a separate score for each hip as well as a total. Those scores describe radiographic appearance; they still do not show exactly which side hurts or how well the dog functions. [4]

A new or persistent limp, stiffness, difficulty rising, reduced willingness to exercise or signs of pain deserve prompt veterinary assessment. Sudden inability to stand, severe distress or a rapidly worsening problem needs urgent veterinary attention.

Hip dysplasia is only one possible cause of these signs. An examination can locate the painful area, assess the dog's overall condition and decide whether imaging or other tests are appropriate. [3]

Clinical diagnosis combines the dog's history, gait and physical examination with suitable hip radiographs. No single movement seen at home can confirm hip dysplasia.

The vet looks for pain, reduced movement, muscle loss and joint looseness, then interprets imaging alongside those findings. The aim is to understand both hip structure and what is affecting this particular dog's comfort and mobility. [3]

A vet may watch the dog walk and rise, feel the muscles and joints, and assess hip movement, pain, stiffness, grinding or looseness. The rest of the hind limbs and back also matter.

Some hands-on tests look for excessive hip laxity, but these findings are interpreted as part of a complete examination. They are not reliable enough on their own to establish a diagnosis or predict future arthritis. [2]

Hip radiographs show the shape and fit of the ball and socket, the position of the femoral head and evidence of arthritic change. They help confirm structural disease and plan care.

Different radiographic methods answer somewhat different questions, such as established remodelling or joint laxity. The images therefore need veterinary interpretation in the context of the dog's age, examination and reason for imaging. [3]

No. An X-ray can show hip shape and osteoarthritis, but the amount of radiographic change does not reliably measure a dog's pain or ability to move.

Clinical function, behaviour and examination findings remain essential. A dog with marked changes may cope well, while another with less dramatic images may be uncomfortable, so treatment decisions cannot sensibly be based on the picture alone. [5]

Sedation or anaesthesia helps a dog remain still and allows the hips and legs to be positioned accurately without manual restraint. Clear, consistent positioning is important for useful radiographs.

For a clinical investigation, the veterinary team selects an approach that suits the dog and the images required. Official BVA screening has its own stricter positioning and restraint rules because scores need to be comparable. [1]

Sometimes. Extending the hind limbs for a standard view can tighten tissues around the hip, so looseness or partial displacement may be less visible on that image.

Stress radiography and other specialised views can assess different features when clinically relevant. There is no single imaging method that answers every question, and the appropriate method depends on the dog's age and purpose of the examination. [1]

Yes. Several standardised systems assess canine hips, and they do not all measure or report exactly the same features. Some emphasise joint shape and arthritic change, while stress views measure laxity.

A BVA hip score should therefore be interpreted within the BVA scheme, not converted casually into another system's grade. Clinical imaging may also include additional views when a surgeon is planning a particular procedure. [2]

The BVA/Royal Kennel Club scheme assesses standard hip radiographs and issues a score intended to help breeders choose breeding dogs with less evidence of hip dysplasia.

It is a population-health and breeding tool, not a complete health check. The scheme does not assess every inherited or clinical problem, and its score does not replace a veterinary examination of pain or mobility. [6]

The scheme is open to registered and unregistered dogs, but a dog must be at least one year old and permanently identified by microchip or tattoo when submitted. There is no upper age limit.

Royal Kennel Club registration documents are also needed when the dog is registered there. Eligibility for an official score is separate from clinical need: a younger dog with concerning signs can still be assessed by a vet outside the breeding scheme. [6]

A veterinary practice takes the required hip radiograph and submits it through the Canine Health Schemes portal. BVA checks image quality before expert scrutineers assess the hips and agree a score.

The result is returned through the submitting vet, with a digital certificate. For eligible Royal Kennel Club-registered dogs, the score is also published in the club's health-results system. [4]

BVA scoring uses a standard view so the hips can be assessed consistently. Pelvic tilt or incorrect leg position can change how the joints appear and may prevent accurate scoring.

The dog lies on its back with the pelvis straight and the hind legs extended and rotated into the specified position. Images that do not meet identification, positioning or quality requirements can be rejected. [6]

Official BVA hip radiographs require general anaesthesia, narcosis or deep sedation so the dog can be positioned accurately using mechanical rather than manual restraint. This also supports radiation safety for staff.

The veterinary surgeon chooses the medicines and monitors the individual dog. The requirement belongs to the official imaging procedure; it does not mean that every dog with suspected hip pain needs the same kind of sedation. [6]

BVA sends an accepted radiograph to veterinary scrutineers with advanced expertise in radiology or orthopaedics. Scrutineers work in pairs and agree the score.

This central assessment is designed to make scheme results more consistent than an informal reading of an X-ray. The dog's own vet remains the right person to interpret what the result means for that dog's clinical care. [4]

Each hip is scored from 0 to 53, producing a combined total from 0 to 106. Lower scores mean less radiographic evidence of hip dysplasia and secondary osteoarthritis within this scheme.

The total is a structured description of the submitted X-ray, not a percentage and not a pain scale. It is most useful for breeding when compared with current information for the same breed and with relatives' results. [4]

The right and left hips are assessed separately because their radiographic changes can differ. The certificate shows both component totals, commonly written as two numbers, as well as the combined score.

Looking only at the combined number can hide an uneven result. Even so, neither side's score identifies pain by itself; clinical examination is needed to understand whether and where a dog is uncomfortable. [3]

The first three scored features describe primary changes in hip conformation and fit. The other six describe secondary arthritic responses that can develop around a dysplastic joint.

Secondary-change scores may rise as a dog ages and osteoarthritis progresses. This is one reason the components add useful context, but their purpose remains radiographic scoring rather than measuring the dog's current pain. [4]

No. A BVA hip score grades specified features on a standard breeding-screen radiograph. A clinical diagnosis asks a broader question about the dog's signs, examination, imaging and health.

A clinically comfortable dog can have a high score, and an uncomfortable dog needs assessment even if a previous score was low. The score cannot by itself diagnose the cause of pain, choose treatment or predict an individual's future. [6]

The breed median is the middle score among dogs of that breed in the stated BVA reporting period. Breeding guidance compares a candidate's score with the current median rather than using one universal cut-off for every breed.

BVA advises selecting breeding dogs with scores below or close to the published breed median. The reporting period and table date matter because medians can change; a median is not a threshold for pain, diagnosis or treatment. [7]

An estimated breeding value uses a dog's own result together with family and pedigree information to estimate genetic risk more accurately than one hip score alone. It is a breeding aid, not a diagnosis.

Where EBVs are available, BVA recommends using them alongside the scheme result and considering relatives' scores. These tools can reduce risk across generations, but they cannot guarantee that every puppy will have healthy hips. [4]

Management is tailored to the dog's pain, mobility, age, health and joint changes. It may combine weight control, adjusted activity, rehabilitation, veterinary pain relief and environmental support, with surgery considered for selected dogs.

There is no single plan for every X-ray score. The clinical response is reviewed over time, because needs can change as a young joint develops or osteoarthritis progresses. [1]

Excess body weight increases the load carried by painful or arthritic hips. Reaching and maintaining an appropriate body condition is therefore a foundational part of many long-term plans.

Weight is considered together with muscle condition, age, diet and activity rather than as a number in isolation. A veterinary team can set a safe, realistic plan for an individual dog, especially during growth or when exercise is limited. [5]

Exercise is usually adjusted rather than removed altogether. Regular, controlled activity can support muscle strength and general health, while the amount, surface and intensity need to match the dog's age, pain and current ability.

Large bursts of activity after quiet periods may be harder to tolerate than a consistent routine. A veterinary or rehabilitation professional can adapt activity when lameness changes, after surgery or while a young dog is still developing. [5]

Rehabilitation can help maintain strength, joint movement and practical function when it is designed for the individual dog. Home changes may reduce avoidable difficulty, particularly on slippery floors or around steps and resting places.

Physical therapy covers several techniques with different evidence and purposes, so professional assessment matters. The most useful programme is one the dog tolerates and the household can sustain, with progress reviewed rather than assumed. [5]

Veterinary pain management may include licensed anti-inflammatory or other analgesic medicines, often as one part of a broader osteoarthritis plan. The choice depends on the dog's health, other medicines and response.

A vet assesses benefits and risks and decides what monitoring is appropriate. Human painkillers and another pet's prescription are not safe substitutes, and a hip score alone is not enough to choose medication. [5]

Surgical options include procedures that improve a growing hip's coverage, femoral head and neck excision, and total hip replacement. They have different aims, risks and eligibility requirements.

Age and timing matter because joint-preserving operations such as juvenile pubic symphysiodesis or pelvic osteotomy are considered early, before established degenerative change. Other operations may be considered later; an orthopaedic assessment determines whether surgery suits the individual dog. [1]

The outlook varies widely. Many dogs remain comfortable with a tailored long-term plan, while others develop substantial osteoarthritis, pain and mobility limits that require more intensive care or surgery.

An X-ray score cannot forecast one dog's future. Current comfort, function, other health problems, home environment and response to management all shape quality of life, so regular reassessment is more informative than the screening number alone. [1]