TL;DR: A cat walking in circles with leg pain is a high-priority medical emergency that often indicates a serious neurological or vascular issue. Seek immediate veterinary attention and record a video of the behavior to assist with a rapid diagnosis.
Why is my cat walking in circles and appearing to be in leg pain?
Observing your cat walking in circles while appearing to be in leg pain can be a frightening experience. While it may seem like a simple orthopedic injury, the combination of circling and limb discomfort often points to a complex neurological or vascular issue. Circling typically occurs when one side of the brain or the vestibular (balance) system is affected, or it may be a reactive behavior to extreme, localized pain.
When should I seek emergency veterinary care for my cat?
Urgency Level: High. This behavior is a medical emergency that requires immediate intervention.
- Seek veterinary evaluation immediately if your cat is circling, dragging a limb, or vocalizing in pain.
- These symptoms can signal a "Saddle Thrombus" (a blood clot blocking blood flow to the legs), a stroke, or severe vestibular disease.
- Time is of the essence to manage pain and prevent permanent damage.
How does taking a video or photo of my cat help with triage?
- Capture a quick video of your cat's movement to help the vet see behaviors that might be hidden once the cat is stressed at the clinic.
- A recording allows the veterinarian to see the exact nature of the circling and the specific way the leg is being favored.
- Visual evidence is vital for ensuring an accurate and rapid diagnosis during the triage process.
Clinical Context (Merck Veterinary Manual)
When a cat presents with circling and leg pain, arterial thromboembolism should be considered, though misdiagnosis with neurologic abnormalities is common. Examination should include Doppler blood flow readings of the hindlimbs, as well as ultrasound to identify a thromboembolus. Pathologic changes distal to the level of the middle to lower thigh, characterized by focal muscle necrosis and degeneration of the sciatic nerve, may be present. Differential diagnoses include neuropathic pain, myopathies, and focal seizures. Management includes analgesics, nursing care, and treatment of any underlying disease. Anticoagulants may be used to reduce continued thrombus formation. Neurologic deficits may improve within weeks, but permanent deficits are possible.
Chapter: Cardiology, Emergency
Source: The Merck Veterinary Manual, 11th Edition (Page 127)