Can Cats Eat Mustard?
Food-safety reference.
Short answer
No, cats should not eat mustard.
According to PlainPetFood's editorial compilation of common veterinary guidance (no public authority we could cite names this food), our cat rating is unsafe. Portion guidance: None. Watch for: Vomiting, diarrhea. The same food is rated unsafe for dogs; feline metabolism often differs, so do not transfer the dog rating. Ask your veterinarian about your own animal.
No. Cats should not eat mustard.
Food-safety rating slip
Cats can-eat rating UNSAFE Mustard
UNSAFE · Other Foods · 36.4% cat-haz
- LEVEL unsafe
- DOG unsafe
- SHARE 36.4% haz
- RISK 2 risks
- BEN 0 benefits
- SYMP listed
- SRC editorial
- PHOTO Coconut Oil
Category photo peer: Coconut Oil (caution)
Cat rating for mustard is unsafe. Dogs: unsafe. Other Foods neighbourhood compares 6 foods by hazard band. Band scores are ordinal (toxic=4 → safe=1), not clinical doses. Read with this food →
Category standing
Unsafe for cats and dogs alike
Both species land on unsafe for Mustard. In other foods, 4 of 11 cat ratings are unsafe or toxic, skip it for either pet.
Portion & Preparation
- Recommended Portion
- None
Risks & Warnings
- ⚠ Same mustard seed toxicity
- ⚠ GI irritant
Warning Signs
Vomiting, diarrhea
If your cat shows these symptoms, contact your vet or call ASPCA Poison Control: 888-426-4435
Also Safe for Dogs?
Mustard seed is the toxin; mustard as condiment in tiny amounts less dangerous but not recommended
Full dog safety guide for Mustard →🚨 Pet Poison Emergency
ASPCA Animal Poison Control
888-426-4435
24/7, consultation fee may apply
Other Other Foods for Cats
Read our methodology - how this data is sourced, computed, and verified.
PlainPetFood publishes an editorial food-safety compilation. When the FDA or ASPCA Animal Poison Control Center names a food as dangerous, that food's page links the source; other ratings are identified as editorial guidance. Its cat rating, portion, preparation notes and warning signs are rendered from the food-safety archive; a named FDA or ASPCA source is linked above when that authority names this food. See our editorial standards & corrections policy, report a correction, the methodology behind these numbers, or contact the editorial team. Data current as of August 29, 2026.