Hip Dysplasia
Hip dysplasia is a genetic skeletal condition where the ball and socket joint of the hip does not develop properly. The joint becomes loose, leading to abnormal wear, inflammation, and eventually degenerative joint disease (osteoarthritis). It is one of the most common orthopedic conditions in dogs, particularly affecting large and giant breeds.
Symptoms & Signs
- Decreased activity or reluctance to exercise
- Difficulty rising from a lying position
- Bunny-hopping gait when running
- Lameness in the hind legs
- Loss of muscle mass in the thighs
- Stiffness after rest
- Audible clicking sound from the hip
- Reluctance to climb stairs or jump
Causes & Risk Factors
Hip dysplasia is primarily a hereditary condition influenced by multiple genes. Environmental factors such as rapid growth, excessive weight gain during puppyhood, inappropriate exercise on developing joints, and nutritional imbalances can exacerbate genetic predisposition. Overfeeding puppies of large breeds accelerates growth and increases the severity of hip dysplasia.
Diagnosis
Diagnosis involves physical examination (Ortolani test), radiographic evaluation (X-rays) of the hip joints, and assessment of clinical signs. The Orthopedic Foundation for Animals (OFA) and PennHIP provide standardized scoring systems. Early screening can detect the condition before clinical signs appear.
Treatment
Treatment ranges from conservative management (weight control, controlled exercise, anti-inflammatory medications, physical therapy, joint supplements) to surgical options including juvenile pubic symphysiodesis (JPS), triple pelvic osteotomy (TPO), femoral head ostectomy (FHO), and total hip replacement (THR).
Prevention
Prevention focuses on responsible breeding with hip-scored parents, maintaining lean body condition during growth, providing appropriate exercise for developing joints, feeding large-breed puppy formulas that control growth rate, and avoiding high-impact activities during skeletal development.
Prognosis
With appropriate management, most dogs with mild to moderate hip dysplasia can maintain good quality of life. Severe cases may require surgical intervention. Early detection and intervention significantly improve long-term outcomes.