No. White mustard is toxic to dogs.

American white mustard is a medicinal herb used for treating infections, colds, coughs, muscle pain, etc. in people.

But for dogs, white mustard can be downright toxic due to its isothiocyanate content. Studies have shown that isothiocyanates result in gastric irritation in dogs when consumed in more than 10% of the dog’s diet.

This means that small dogs could get very sick even if they eat a tiny bit of white mustard. Symptoms of isothiocyanates toxicity start with gastric pain, vomiting, and diarrhea and may even turn fatal if prompt medical treatment is not sought. 

This is why it is important to keep white mustard leaves and seeds out of your dog’s reach. If your pet has consumed a few white mustard seeds, mostly it should be fine. However, you might still want to monitor your dog. If it starts showing signs of uneasiness or distress, then please take it to the vet.

To ensure your pet will live a long and healthy life, it is always a good idea to invest in pet health insurance. Preparing for the unexpected guarantees money is never an issue in keeping you pup healthy.