Is It Normal for a Cat to Stick Its Tongue Out Often?

A cat with its tongue out is often just adorable — and usually harmless, from a grooming interruption, a short chin, heat, or post-play panting. But frequent tongue-out with drooling, bad breath, or heavy breathing after little exercise can signal mouth disease (stomatitis, periodontal disease) or heart/lung trouble and warrants a vet check.