TL;DR: Knuckling, or walking on the tops of the paws, is a serious neurological emergency that requires immediate veterinary evaluation to prevent permanent paralysis.
What does it mean if my dog is knuckling or walking on the tops of their paws?
Walking on the tops of the paws, clinically known as knuckling, occurs when a dog is unable to flip their paw over to the correct position while walking or standing. Instead of walking on their pads, the dog drags or rests on the hair-covered top of the foot. This happens when the communication between the dog's brain and their limbs is interrupted, often due to nerve damage or spinal cord compression.
Is it an emergency if my dog starts knuckling?
- The urgency level for this symptom is High, as knuckling is frequently a sign of serious conditions such as Intervertebral Disc Disease (IVDD), spinal trauma, or fibrocartilaginous embolism (FCE).
- Because neurological issues can progress rapidly to permanent paralysis, your dog should be evaluated by a veterinarian or an emergency specialist immediately.
- Prompt intervention often makes the difference in a dog's ability to walk again.
How can photos and videos help the vet triage my dog's knuckling?
- Providing your veterinarian with a short video of your dog attempting to walk or a photo of the paw's positioning is incredibly helpful.
- These visuals allow the triage team to assess the severity of the neurological deficit and the specific limbs involved before you even arrive.
- This documentation helps the medical team prepare for your arrival and determines the speed at which your dog needs to be seen.
Clinical Context (Merck Veterinary Manual)
Interdigital furunculosis can cause a dog to walk abnormally. Early lesions may appear as focal or generalized areas of erythema and papules in the webbing of the feet that, if left untreated, rapidly develop into single or multiple nodules. These nodules are usually 1-2 cm in diameter, reddish-purple, shiny, and fluctuant; they may rupture when palpated and exude a bloody material. Interdigital furuncles are most commonly found on the dorsal aspect of the paw but may also be found ventrally. Furuncles are usually painful, and the dog may be obviously lame on the affected foot (or feet) and lick and bite at the lesions.
Chapter: Musculoskeletal
Source: The Merck Veterinary Manual, 11th Edition (Page 1067)