TL;DR: A clicking sound in a cat's hip is usually caused by joint issues like arthritis or hip dysplasia and is typically only an emergency if accompanied by pain or limping.
What causes the clicking or popping sound in my cat's hip?
An audible clicking or popping sound in a cat's hip, often referred to as crepitus, can occur when ligaments, tendons, or gas bubbles move over bony structures during movement. In cats, this is frequently associated with joint laxity, hip dysplasia, or the early stages of osteoarthritis. While the sound itself can be startling, it is essentially the physical manifestation of joint surfaces or surrounding tissues interacting as your cat walks or stretches.
When should I consider my cat's hip clicking an emergency?
- If your cat is behaving normally, eating, and moving without a limp, the urgency level is generally low.
- Book a routine appointment to evaluate joint health and prevent long-term degradation.
- Seek immediate care if the clicking is accompanied by sudden lameness, signs of pain, or a refusal to jump.
Why should I take photos and videos of my cat's hip for the veterinarian?
- Videos allow the vet to observe the specific gait and movement that triggers the sound in a stress-free environment.
- Cats are experts at hiding pain in a clinic, making home videos an invaluable diagnostic tool.
- Photos help the vet assess any visible swelling or abnormal hip alignment that may be present.
Clinical Context (Merck Veterinary Manual)
Hip dysplasia, a bilateral malformation of the hip joint often associated with secondary osteoarthritis, may cause a clicking sensation as the head of the femur pops in or out of the joint. An abnormal gait may develop in rapidly growing animals. Radiography can confirm the diagnosis, especially in young animals.
Chapter: Orthopedics
Source: The Merck Veterinary Manual, 11th Edition (Page 1197)