Why Does My Dog Lick the Air?

Why does my dog lick the air? The Short Answer

Why does my dog lick the air? An occasional snap or lick at the air usually means your dog noticed something — a scent, a fly, a floating dust mote — and is investigating it the way dogs investigate everything, with their mouth. Frequent, repetitive air-licking with no visible trigger is a different matter, and it’s studied under a specific name: fly-catching syndrome.

What Fly-Catching Syndrome Actually Is

Fly-catching syndrome (sometimes called fly-biting) describes sudden, repeated episodes of a dog snapping or licking at the air as if catching an invisible insect, with the dog otherwise alert and responsive throughout. A 2015 study in Epilepsy & Behavior examined 24 dogs with this pattern using EEG, MRI, and other diagnostics, and found the picture was genuinely mixed: some cases responded to antiepileptic medication, consistent with a focal seizure originating in the visual or temporal cortex, while others pointed toward a completely different cause.

The Gut-Brain Connection

A separate 2012 Canadian study — the same research group behind the excessive surface-licking findings covered in our excessive licking guide — identified gastrointestinal disease as the single most common underlying cause of fly-catching-type behavior in the dogs they studied, ahead of neurological causes. In other words, air-licking and air-snapping may frequently be a gut-brain axis symptom rather than a seizure or a compulsion at all.

Breed Patterns

Certain breeds show up disproportionately in fly-catching case studies, particularly Cavalier King Charles Spaniels — in that breed, it’s sometimes linked to Chiari-like malformation, a structural brain and skull condition — along with Miniature Schnauzers and French Bulldogs.

When to See a Vet

A single, brief air-lick with an obvious trigger (an actual fly, an interesting smell) needs no action. Frequent, unprompted episodes — especially several times a day, or paired with any change in awareness — are worth a full veterinary workup that considers neurological, gastrointestinal, and behavioral causes together, since research suggests all three are genuinely in play across different dogs.

Quick Answers to Related Questions

Is this the same as a seizure?
Sometimes, but not always. Unlike a generalized seizure, dogs with fly-catching syndrome typically stay alert and responsive to their surroundings during an episode, though some cases are confirmed as focal (partial) seizures on EEG.

Could it just be nausea?
Yes — air-licking and excess swallowing are both recognized pre-vomiting signs, and the gut-brain connection above means a stomach or intestinal issue is a genuinely common explanation.

The Bottom Line

So, why does my dog lick the air? Occasional air-licking is nothing to worry about. A repeated, unprompted pattern is worth investigating properly, because the research points to three real and different underlying causes — neurological, gastrointestinal, and compulsive — that all need different treatment.

Related Posts

Why Does My Dog Lick Me?
Why Is My Dog Licking Excessively? 12 Medical & Behavioral Causes
When to See a Vet About Your Dog’s Licking

Sources

Bécuwe-Bonnet, V. et al. (2012). Gastrointestinal disorders in dogs with excessive licking of surfaces. Journal of Veterinary Behavior.
Retrospective multicenter evaluation of the “fly-catching syndrome” in 24 dogs. Epilepsy & Behavior (2015).
Cavalierhealth.org — Flycatcher’s Syndrome and the Cavalier King Charles Spaniel.

All factual claims on Pawsidor trace to peer-reviewed research, university studies, or books by credentialed animal scientists.