TL;DR: Plantigrade posture occurs when a cat walks "flat-footed" on its back legs and is usually a sign of an underlying medical issue requiring a veterinary visit within 24 to 48 hours.
What does it mean if my cat is walking flat-footed on its back legs?
Normally, cats are digitigrade, meaning they walk on their toes. When a cat begins walking "flat-footed," where the back part of the leg (the hock or ankle) touches the ground, it is known as a plantigrade gait. This change is typically a sign of nerve damage, muscle weakness, or tendon issues in the hind limbs.
How quickly does my cat need to see a vet for a plantigrade gait?
- The urgency level for a plantigrade gait is Medium; while rarely a sudden life-threatening emergency, it requires professional medical attention.
- Aim to have your cat evaluated by a veterinarian within 24 to 48 hours.
- Seek emergency care immediately if your cat is unable to stand, has cold paws, or appears to be in extreme distress.
Why should I record a video of my cat's walking posture for the vet?
- Capture a video of your cat walking at home where they are comfortable, as cats often mask symptoms or walk differently due to stress at the clinic.
- Provide a clear view of the abnormal gait to help the veterinary team assess the severity of the drop.
- Use the footage to help your veterinarian determine which diagnostic tests are most appropriate for your cat.
Clinical Context (Merck Veterinary Manual)
Plantigrade posture, characterized by walking flat on the hocks, can be indicative of underlying lameness. Determining the cause of lameness is critical as treatment varies greatly depending on the etiology. While abnormal posture can help deduce the location of pain, conditions such as fibrotic myopathy of the semitendinosus muscle or restrictions caused by annular ligaments, adhesions, or severe fibrosis can also contribute to the presentation. Radiographs and thorough clinical examination are essential to differentiate between these causes and guide appropriate therapy.
Chapter: Musculoskeletal
Source: The Merck Veterinary Manual, 11th Edition (Page 1067)