TL;DR: A cat refusing to put weight on a limb is in significant pain and should be evaluated by a veterinarian within 12 to 24 hours, or immediately if there is visible bone or heavy bleeding.
What does it mean if my cat is not putting any weight on its leg?
When a cat is non-weight bearing, it means they are holding their leg up and refusing to let it touch the ground while walking or standing. This behavior is a clear clinical sign of significant pain, discomfort, or structural instability. It could be caused by anything from a simple thorn in the paw pad to more serious issues like a fracture, dislocation, or a severe soft tissue injury.
When should I consider my cat's leg injury a veterinary emergency?
- Medium Urgency: A non-weight bearing limb typically requires a veterinary evaluation within 12 to 24 hours as it indicates acute pain.
- Immediate Emergency: Seek care right away if you notice the limb is dangling, there is visible bone, or there is heavy bleeding.
- Signs of Distress: Treat the situation as an emergency if your cat is unusually lethargic or vocalizing in distress.
How does providing a photo help the triage team assess my cat?
- High-quality images allow triage assistants to check for swelling, redness, or puncture wounds that may be hidden by fur.
- Photos help identify if the leg is at an abnormal angle, indicating potential structural damage.
- Visuals allow the veterinary team to provide specific advice on how to safely transport your cat to the clinic to prevent further injury.
Clinical Context (Merck Veterinary Manual)
When triaging a cat presenting with acute, non-weight bearing lameness of the right front leg, a thorough physical examination should be performed, assessing the limb from distal to proximal for swelling, pain, instability, crepitation, reduced range of motion, and muscle atrophy. Serial examinations before and after exercise may be necessary for subtle lameness. Diagnostic imaging, including radiography, ultrasonography, CT, or MRI, may be required to determine the underlying cause of the lameness. Sedation may be required for fractious animals to allow for adequate palpation, radiography, and arthrocentesis.
Chapter: Cardiology
Source: The Merck Veterinary Manual, 11th Edition (Page 1245)