Arthritis is a broad term for disease affecting the joints. One of the most common forms in dogs is osteoarthritis (OA), a long-term condition involving changes to the cartilage, underlying bone and other tissues within a joint.

Healthy joints allow bones to move smoothly. A layer of specialised cartilage covers the ends of the bones, helping the joint tolerate and distribute forces during everyday movement.

With osteoarthritis, this joint environment changes. Cartilage can deteriorate, the underlying bone may remodel, and inflammation can affect the surrounding tissues. These changes may be associated with stiffness, altered movement and discomfort.

Osteoarthritis is generally a progressive condition, but its effects vary. Some dogs show relatively subtle changes, while others experience more noticeable difficulties with everyday activities.

The extent of changes visible on an X-ray also does not always correspond directly to the signs a dog displays. Each dog's condition needs to be assessed individually.

There is no single cause of canine osteoarthritis. Several factors can contribute to changes within a joint, and more than one may be involved in an individual dog.

Age-related changes

Years of repeated movement and loading can contribute to changes in the joints. However, age alone does not determine whether a dog will develop osteoarthritis, and reduced mobility should not automatically be attributed to getting older.

Developmental joint abnormalities

Conditions such as hip and elbow dysplasia affect how a joint develops and functions. Abnormal joint structure or instability can alter the distribution of forces and increase the risk of secondary osteoarthritis.

Previous injuries

Some fractures, ligament injuries and injuries involving joint cartilage can change normal joint mechanics. Osteoarthritis may develop as a consequence of this damage, sometimes long after the original injury.

Body weight and activity

Excess body weight increases the mechanical demands placed on weight-bearing joints. Appropriate physical activity helps maintain muscle strength and general fitness, while the type and amount of exercise should be suitable for the individual dog's age, health and physical condition.

Genetics, breed, conformation, previous injuries and other health factors may also influence a dog's risk of developing joint disease.

Hip dysplasia is a developmental condition in which the hip joint does not develop or function normally. It is influenced strongly by genetics, although other factors can affect how the condition develops and progresses.

In a healthy hip, the rounded head of the thigh bone fits into the socket of the pelvis. In a dysplastic hip, the joint may be loose or poorly aligned, allowing excessive movement between the bones.

This instability can lead to abnormal loading of the joint. Over time, the resulting changes may damage cartilage and contribute to the development of secondary osteoarthritis.

Hip dysplasia is particularly associated with some large and giant breeds, including German Shepherds, Labrador Retrievers and Great Danes. However, dogs of other breeds and sizes can also be affected.

Not every dog with hip dysplasia displays obvious signs. Some dogs may have structural abnormalities but show few noticeable changes in everyday movement.

Hip dysplasia and osteoarthritis are related, but they are not the same condition. Dysplasia can increase the risk of secondary osteoarthritis, but the outcome varies between dogs.

Elbow dysplasia describes a group of developmental abnormalities affecting the elbow joint. It is recognised particularly in certain medium, large and giant breeds.

The elbow is a complex joint, and abnormalities in the growth or development of its bones and cartilage can interfere with normal joint movement.

Conditions associated with elbow dysplasia include:

These conditions can cause abnormal joint loading and damage, increasing the risk of secondary osteoarthritis.

Signs associated with elbow dysplasia

• Front-leg lameness.
• Stiffness after resting.
• Reluctance to exercise or play.
• Changes in gait, particularly after activity.
• Reduced willingness to jump or negotiate obstacles.

Elbow dysplasia often becomes apparent in young dogs, although the consequences of joint damage can continue into adulthood.

Similar symptoms can arise from other orthopaedic conditions. A veterinary assessment is important to establish the cause of persistent lameness or stiffness.

Dogs cannot tell us when their joints feel uncomfortable. Instead, owners may notice gradual changes in movement, activity or behaviour.

These changes can be subtle at first, and not every dog shows the same signs.

These signs do not automatically mean that a dog has arthritis. Injuries and other health conditions can produce similar symptoms.

A veterinarian will consider your dog's medical history, age, breed, activity levels and the changes you have observed.

An examination may include assessing gait, joint movement, muscle condition and signs of discomfort. Depending on the findings, further investigations may be recommended.

Imaging and other investigations

X-rays can help identify changes associated with osteoarthritis and some developmental joint abnormalities. In selected cases, further imaging, such as CT, or other diagnostic procedures may be appropriate.

Imaging findings do not always correspond directly to the degree of discomfort or difficulty moving that an individual dog experiences. Diagnosis should therefore take account of the overall clinical picture.

The most appropriate approach depends on the underlying diagnosis, the joints involved, the dog's age and general health, and the severity of the problem.

A veterinarian can help establish an individual care plan and review it as the dog's needs change.

Maintaining a healthy body weight

Keeping a dog at an appropriate weight is an important part of general joint care. Excess body weight increases the mechanical load on weight-bearing joints.

Your veterinarian can assess body condition and advise on an appropriate feeding plan if weight management is needed.

Appropriate exercise

Regular, controlled activity can help maintain muscle strength, fitness and general wellbeing. The right routine depends on the individual dog and any underlying condition.

Depending on the circumstances, shorter walks, consistent activity and suitable low-impact exercise may be preferable to occasional strenuous exercise. A veterinarian or qualified canine rehabilitation professional can advise on a suitable routine.

A comfortable home environment

Small changes around the home may make everyday activities more accessible. Consider supportive bedding, non-slip flooring, accessible resting areas and ramps where appropriate.

Reducing repeated jumps from furniture or in and out of vehicles may also be helpful for some dogs with mobility difficulties.

Veterinary treatment options

Depending on the diagnosis, management may include prescribed pain relief, anti-inflammatory medication, physiotherapy or rehabilitation, and other veterinary interventions.

Some dogs with significant structural joint problems may benefit from surgery. Options depend on the condition, its severity and the dog's individual circumstances.

Because genetics play a significant role in hip and elbow dysplasia, these conditions cannot always be prevented. However, responsible breeding and appropriate care during growth can help address some recognised risk factors.

• Responsible breeding: choose breeders who undertake relevant health screening and can explain the results for their breeding dogs.
• Suitable nutrition: feed puppies a complete, balanced diet appropriate for their life stage, with particular attention to healthy growth in large and giant breeds.
• Healthy body condition: avoid excessive weight gain during development.
• Age-appropriate activity: provide suitable exercise and avoid repeatedly overloading growing joints.
• Early assessment: seek veterinary advice if a young dog develops persistent stiffness, lameness or an unusual gait.

These measures cannot guarantee that a dog will remain free from dysplasia or osteoarthritis. They form part of a responsible approach to development, general health and long-term wellbeing.

Final Thoughts

Changes in movement deserve attention, whether they appear gradually as a dog gets older or arise in a younger animal.

Understanding the relationship between arthritis, hip dysplasia and elbow dysplasia helps owners recognise when something may be wrong and seek appropriate advice.

With veterinary assessment, suitable exercise, healthy body-weight management and an individualised care plan, many dogs with joint conditions can continue to enjoy meaningful activities and a good quality of life.

If you notice persistent stiffness, lameness or changes in your dog's normal movement, speak to your veterinary practice. Early assessment can help identify the cause and establish the most appropriate care for your dog.

The following resources provide further information about osteoarthritis, hip dysplasia and elbow dysplasia in dogs. They are offered for independent educational reading.