Not Safe for Dogs
Medium dog serving: never
Key warning: all mustard — yellow Dijon whole grain all varieties
Can Dogs Eat Mustard? No — Mustard Seeds Contain Toxic Glucosinolates
This food is NOT safe for dogs. Keep it away from your pet.
Mustard is not safe for dogs. Mustard seeds contain glucosinolates that are toxic to dogs causing vomiting diarrhea and inflammation. Even small amounts of mustard cause significant digestive upset.
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Warning Signs & Symptoms
Glucosinolates from mustard seeds: vomiting diarrhea abdominal pain. Large amounts: more severe GI inflammation. All mustard varieties: contain mustard seed compounds.
If Your Dog Ate This
Call vet or ASPCA Poison Control 888-426-4435 if significant amount consumed.
What to Avoid
all mustard — yellow Dijon whole grain all varieties
Preparation & Serving
Monitor for vomiting and digestive upset. Call vet if significant amount consumed.
Did you know?
Mustard has been cultivated for over 5000 years and is one of the most widely used spices in the world. The Dijon region of France has produced mustard since the 13th century. The pungent heat of mustard comes from the enzymatic reaction that occurs when mustard seeds are crushed in the presence of water — the enzyme myrosinase breaks down glucosinolates to create isothiocyanates. This reaction is delayed by acid which is why Dijon mustard made with verjuice is milder than English mustard made with water. The same glucosinolates that create mustard's heat cause digestive distress in dogs.
Portions & nutrition
- Serving (small dog)
- never
- Serving (medium dog)
- never
- Serving (large dog)
- never
- Calories (per 100g)
- 66
- Safe frequency
- Never
Source
What You Need to Know
Mustard seeds contain glucosinolates — the same compounds that make cruciferous vegetables potentially problematic but in much higher concentrations. Even small amounts of mustard (yellow Dijon whole grain) cause digestive upset and potentially more serious GI inflammation in dogs. Hydrogen peroxide was historically suggested as a dog vomiting inducer but the mustard-as-emetic home remedy is dangerous — the mustard compounds themselves cause harm.
Not sure what to do next? Read our emergency guide What to Do If Your Dog Eats Something Toxic
Want to know what other dangers are hiding in your home?
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Take the safety quizIf Your Dog Ate This — Act Now
- Dog Food Toxicity CalculatorCheck severity based on your dog's weight
- Emergency GuideWhat to do in the next 60 minutes
- Dog Poisoning SymptomsKnow what to watch for
- Dog Poisoning TreatmentWhat vets actually do
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- Best Pet InsuranceBe prepared before the next emergency
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