Can dogs eat mustard?
Last reviewed June 2026 · Sourced from ASPCA & Merck Veterinary Manual
The short answer
Sometimes — with caution — dogs should only have small amounts of mustard. Skip — mustard seeds toxic Mustard seed paste.
Why be careful
Mustard seeds contain compounds causing GI upset.
Symptoms to watch for
Vomiting, diarrhea.
What to do if your dog ate mustard
Stay calm, note how much was eaten, and contact your vet immediately. For urgent help, the ASPCA Animal Poison Control hotline is 888-426-4435. See our full step-by-step guide: Dog ate something toxic — what to do.
Skip — mustard seeds toxic
Puppy safety
Generally avoid feeding mustard to puppies. Their digestive systems are still developing and they're more sensitive to changes in diet, fat, sodium, and lactose than adults. If you've already given some, watch for vomiting, diarrhea, or lethargy and contact your vet if any appear.
What to do if your dog ate mustard
- Note how much was eaten and when. A small amount is rarely an emergency, but a large quantity may need vet attention.
- Watch for symptoms over the next 12–24 hours: vomiting, diarrhea, lethargy, loss of appetite, or changes in drinking/urination.
- Provide fresh water and skip the next meal if your pet seems unsettled — let their stomach calm down.
- Call your vet if symptoms appear or persist beyond 24 hours, or if the amount eaten was significant.
Better alternatives
If your dog likes mustard, they may also enjoy these safe options: