Why is my dog snapping at the air like catching invisible flies?
Hi,
fly biting behavior (snapping at the air as if trying to catch a nonexistent fly) is an obsessive-compulsive behavior, caused by an array of issues that range from eye problems to a form of a focal seizure . This needs to be investigated by a neurologist. If confirms then managed with anti-epileptic medications that are used for generalized seizures.
There is research that presented data indicating that some fly biting may be caused by an underlying medical disorder, GI disease being the most common. At home, these dogs consistently presented more fly biting following feeding, suggesting potential postprandial [after eating] discomfort. In these fly biting dogs, the jaw snapping was preceded by head raising and neck extension. When these dogs received treatment for their GI disease, the fly biting completely resolved in most cases in this research group.
If your dog is fly biting, make sure your vet performs also a complete work-up for gastrointestinal disease. There is a chance you’ll find something that responds to treatment. Hope this helps but the best thing would be to try and find a specialist preferably a neurologist.
Updated on September 23rd, 2025