Hip dysplasia in dogs: causes and treatment options

What is hip dysplasia?

Hip dysplasia (HD) is an abnormal development of the hip joint in which the femoral head does not fit properly into the acetabulum. This causes instability, wear and ultimately osteoarthritis. The condition is multifactorial: genetic predisposition determines susceptibility, but body weight, growth rate and loading during growth strongly influence whether and how severely HD manifests [4]. Large and medium-sized breeds are most commonly affected.

What does the evidence say?

Weight management — strong evidence

Lifelong calorie restriction (approximately 25% less than ad libitum feeding) significantly delayed the onset of radiographically detectable hip osteoarthritis and reduced its severity. This was shown in a randomised cohort study of 48 Labrador retrievers followed throughout their lives [1]. Weight management is therefore the best-supported non-surgical measure: lower body weight means less mechanical loading on the already vulnerable joint.

Omega-3 fatty acids (fish oil, EPA/DHA) — good evidence

In a double-blind RCT, 82% of dogs receiving omega-3 supplements showed significant improvement in weight bearing after 90 days, compared with 38% in the control group; the treatment group showed a 5.6% increase in peak force [2]. This suggests a clinically relevant reduction in inflammation-related pain. Dosage should be adjusted by a veterinary surgeon according to the dog's weight and health status.

Physiotherapy and hydrotherapy — limited but supportive evidence

Controlled rehabilitation strengthens periarticular muscle tissue and reduces joint loading. Direct RCT data specific to HD are lacking, but a systematic review of 14 clinical studies identified weight management and exercise rehabilitation as effective pillars of non-surgical management [3]. Hydrotherapy enables movement with reduced weight bearing and can be particularly valuable in painful dogs.

Pain relief (NSAIDs) — effective, no disease modification

NSAIDs effectively relieve pain but do not alter the course of the condition. Long-term use requires gastric protection and periodic monitoring of renal and hepatic function. This falls outside the complementary domain but is an indispensable pillar in moderate to severe HD.

Surgery — best outcomes in severe cases

In young dogs with instability, a triple pelvic osteotomy (TPO) may be considered; in adult dogs with severe osteoarthritis, femoral head ostectomy (FHO) or total hip replacement offer the best functional outcomes. Assessment by an orthopaedic specialist is necessary [4].

Breeding and screening — proven preventive measure

HD screening of breeding animals via recognised systems (OFA, FCI/HD score) is the most proven measure at population level. Preferably purchase puppies whose parents both have a good HD score.

Complementary ≠ alternative

Weight management and omega-3 supplementation are useful additions to — not a replacement for — veterinary diagnostics and treatment. HD requires radiographic confirmation and an individual treatment plan. Do not use complementary options without first consulting a veterinary surgeon, especially in young dogs where the timing of intervention is decisive for the outcome.

Monitoring and prevention