The heat in wasabi comes from volatile isothiocyanates, so a dog that licks it drools, gags and sneezes almost immediately. It is an irritant, not a poison with a known lethal dose, but larger amounts cause vomiting and diarrhea. Never give it as a joke.
This food guide has not been reviewed by a veterinarian. It summarises general information from sources and should not be used to decide whether a food is suitable for an individual dog or to assess an emergency.
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Check before feeding
Check the precautions before sharing
Risk depends on preparation, ingredients or amount. Read the precautions below; body weight alone cannot establish a safe portion.
Signs and health concerns
This list includes both observable signs and conditions identified through examination or testing. It cannot establish the cause or whether an exposure is safe.
Drooling
Mouth irritation
Gagging
Sneezing
Vomiting
Diarrhoea
Abdominal pain
Coughing
More about this food
Wasabi's burn comes from allyl isothiocyanate and related compounds -- the same chemistry as mustard. They are volatile, so they hit the nose, eyes and mouth at once. Most wasabi sold in tubes and on takeout sushi trays is not true wasabi at all but horseradish, mustard and coloring, and the irritant chemistry is the same either way.
A dog that licks wasabi usually reacts within seconds: heavy drooling, head shaking, pawing at the muzzle, retching, sneezing, watering eyes. That reaction settles on its own in most cases, within minutes to an hour. There is no established lethal dose, so a smear off a sushi roll is not a poisoning. Larger amounts irritate the stomach lining too, and then you get vomiting, diarrhea and abdominal discomfort.
As usual, wasabi rarely travels alone. Sushi comes with soy sauce, and soy sauce is a sodium delivery system: Merck puts salt toxicosis at 2-3 g/kg of sodium chloride with roughly 4 g/kg lethal in dogs, and a dog that laps a dish of soy sauce is a real concern. Wasabi peas and wasabi-flavored snacks add oil, salt and seasoning powders, and they are easy to eat by the bagful. Tube wasabi contains salt and sweeteners, so read the label. The AKC is direct about this class of food: never give dogs spicy varieties, and never add seasoning or salt to their food.
One request: do not feed wasabi to a dog to film the reaction. What looks funny is closer to pain, and a dog that gasps in surprise can aspirate.
For a small lick, rinse the mouth, offer water and watch; most dogs are fine quickly. Call your veterinarian if your dog emptied a tube, drank soy sauce alongside it, vomits repeatedly, keeps coughing, or has a painful belly. The ASPCA Animal Poison Control Center is at (888) 426-4435. Do not induce vomiting at home.
Frequently asked questions
My dog ate a piece of sushi with wasabi on it. Is that an emergency?
Usually not. Expect drooling, gagging and maybe sneezing that settles within an hour, and offer water. The soy sauce matters more than the wasabi, so watch for heavy drinking or vomiting and call if either shows up.
He is sneezing and his eyes are watering after wasabi. What do I do?
That is the volatile irritant hitting the nasal and eye membranes. Move to fresh air, offer water, and it typically settles on its own. Persistent coughing or labored breathing, especially in a flat-faced breed, needs a vet call.
My dog got into a bag of wasabi peas. Should I worry?
The salt, oil and seasoning powders in the snack are the bigger problem than the wasabi coating. A few peas usually means loose stool; a whole bag means free access to water, close watching, and a call to your vet if the label lists onion or garlic powder.
