Dog Biting at Imaginary Flies: Causes and When to See a Vet

TL;DR: Fly-snapping is a behavior where dogs bite at invisible insects, often signaling underlying focal seizures or digestive issues. You should record the episodes and schedule a veterinary exam to determine the cause, especially if the behavior increases in frequency or severity.

What are the symptoms and causes of fly-snapping syndrome in dogs?

• Fly-snapping, or air-biting, involves a dog snapping at or tracking non-existent insects.
• The behavior is often a medical symptom linked to focal seizures (localized electrical disturbances in the brain) or complex gastrointestinal issues.
• In some cases, it may be classified as an obsessive-compulsive disorder or a result of visual disturbances.

Is my dog snapping at the air an emergency that requires a vet visit?

• The urgency level for fly-snapping is generally considered Medium; it is rarely a sudden life-threatening emergency.
• It does require a scheduled veterinary appointment for a full neurological and physical workup.
• Contact your veterinarian immediately if episodes become more frequent or last longer.
• Seek urgent care if your dog seems disoriented or aggressive following a snapping event.

Why is recording a video of the fly-snapping behavior helpful for my veterinarian?

• Because these episodes happen unpredictably, your dog is unlikely to perform the behavior during a clinic exam.
• A clear video allows the doctor to see the dog's facial expressions and eye movement.
• The vet can observe whether the dog remains conscious or responsive during the event.
• This visual evidence is critical in determining if the cause is neurological, behavioral, or related to digestive upset.