Canine hip dysplasia (CHD) is a developmental condition with genetic and environmental factors. Use the X-Ray Analyzer AI to learn radiographic patterns and the Orthopedic Specialist for management options.
Canine hip dysplasia (CHD) is a developmental condition in which the hip joint does not form properly. The femoral head and acetabulum are incongruent, leading to joint laxity, abnormal wear, and eventually osteoarthritis. It has a strong genetic component and is common in large and giant breeds—German Shepherds, Labrador Retrievers, Golden Retrievers, Rottweilers, and others.
CHD is polygenic—multiple genes contribute. Environmental factors also play a role: rapid growth, excessive calorie intake, and inappropriate exercise during development can worsen the phenotype. Breeding dogs should be screened; OFA (Orthopedic Foundation for Animals) and PennHIP are the primary screening programs.
OFA screening uses a ventrodorsal hip-extended radiograph at 24 months (or 12 months for preliminary evaluation). Hips are graded: Excellent, Good, Fair, Borderline, Mild, Moderate, or Severe. Only dogs with Excellent, Good, or Fair grades are recommended for breeding. PennHIP uses a different technique to measure joint laxity (distraction index) and can be performed as early as 16 weeks.
| OFA Grade | Description |
|---|---|
| Excellent/Good | Well-formed joint; minimal laxity; suitable for breeding |
| Fair | Minor irregularities; acceptable for breeding in some breeds |
| Borderline | Inconclusive; repeat in 6 months |
| Mild/Moderate/Severe | Dysplasia present; not recommended for breeding |
Signs vary with severity and age. Young dogs may show lameness, bunny-hopping, or reluctance to jump. Older dogs present with osteoarthritis—stiffness, difficulty rising, exercise intolerance. Some dogs with radiographic dysplasia remain asymptomatic for years.
For many dogs, especially those with mild to moderate changes, conservative management is appropriate. Weight management is critical—excess weight increases joint stress. Controlled exercise—low-impact activities like swimming and leash walks. NSAIDs and other pain medications as prescribed. Joint supplements (glucosamine, chondroitin, omega-3 fatty acids) may help. Physical therapy and rehabilitation can improve strength and mobility.
| Procedure | Best For | Notes |
|---|---|---|
| FHO (Femoral Head Ostectomy) | Small dogs, chronic OA, salvage | Removes femoral head; fibrous false joint forms; good pain relief; lower cost |
| TPO (Triple Pelvic Osteotomy) | Young dogs, no OA yet | Preventive; redirects acetabulum; must be done before arthritis develops |
| THR (Total Hip Replacement) | Large dogs, end-stage OA | Gold standard; restores normal function; expensive; requires specialist |
Lameness, difficulty rising, reluctance to jump or climb stairs, or any change in mobility warrants evaluation. Early diagnosis allows for better management and informed decisions about surgery versus conservative care.
- CHD is developmental and polygenic; OFA and PennHIP screen breeding dogs.
- OFA grades Excellent/Good/Fair are suitable for breeding; Mild/Moderate/Severe indicate dysplasia.
- Conservative management: weight control, low-impact exercise, NSAIDs, supplements.
- FHO for small dogs; TPO for young dogs before OA; THR is gold standard for large dogs.
- Early evaluation enables better management and informed surgical decisions.