Can Dogs Eat Wasabi?

Wasabi's intense, sinus-clearing heat comes from allyl isothiocyanate, a mustard-oil compound that's a powerful irritant to mucous membranes on contact, and it affects a dog's mouth and nasal passages just as sharply as it does a person's, if not more so given a dog's more sensitive sense of smell. A dog that eats even a small amount of wasabi, whether from a dropped piece of sushi or a curious lick of a wasabi paste tube, typically reacts immediately and dramatically - drooling heavily, pawing at their face, and sometimes sneezing repeatedly. Unlike some toxins where the danger builds up quietly, wasabi's effects show up right away, which at least means you'll know something's wrong straight away rather than being caught off guard later. Most reactions, while clearly unpleasant for the dog in the moment, settle within an hour or so with access to water, though a vet check is sensible if the distress seems severe or doesn't ease off.