Fly Biting in Cats: Causes, Symptoms, and Triage Guide

TL;DR: Fly biting is a behavior where cats snap at imaginary insects, often signaling underlying neurological or sensory issues like seizures or Feline Hyperesthesia. While typically not an immediate emergency, you should record the behavior and schedule a vet visit within a few days for a proper diagnosis.

What exactly is fly biting in cats and what causes it?

• Definition: Also known as 'phantom fly snapping,' this is a behavior where a cat tracks and bites at non-existent insects.
• Neurological causes: It is frequently associated with Feline Hyperesthesia Syndrome (FHS), focal seizures, or complex partial seizures.
• Sensory triggers: The behavior can also be caused by 'floaters' in the eyes or dermatological discomfort that creates sudden sensations on the skin.

Is my cat's fly biting considered a medical emergency?

• Urgency Level: The urgency is generally Medium; it is rarely a life-threatening emergency unless accompanied by extreme distress.
• Emergency Signs: Seek immediate care if your cat experiences a grand mal seizure, characterized by loss of consciousness and paddling limbs.
• Recommended Action: Because this behavior affects quality of life, you should schedule a veterinary appointment within the next few days for a diagnostic workup.

Why should I record a video of my cat's fly biting for the veterinarian?

• Intermittent Nature: Cats rarely perform this behavior during a physical exam, making home footage essential for triage.
• Clinical Analysis: A video allows the vet to analyze pupil dilation, muscle movements, and the cat's level of consciousness.
• Diagnostic Accuracy: Clear footage helps the vet distinguish between neurological seizures, compulsive disorders, or physical irritants for a faster diagnosis.