Can Cats Have Mustard? Is mustard bad for cats?

can cats have mustard

Can Cats Have Mustard? Among the various human foods, mustard is a common one that raises questions about its safety for cats. In this blog, we explore the question to provide cat owners with insights into the potential risks of this popular condiment. 

While mustard may be a flavorful addition to our meals, it is essential to understand why it may not suit our furry companions. Let’s understand the details to ensure your cat’s health and happiness.

Can Cats Have Mustard?

The short answer is that mustard is not safe for cats to eat. Cats should not consume the seeds as they can cause several health problems. It frequently includes extra ingredients that are toxic to cats as well.

Mustard, ranging from yellow to dark brown, is a condiment made from mustard plant seeds. These seeds are crushed and mixed with water, vinegar, lemon juice, salt, wine, honey, and other spices to create the condiment. 

Mustard can be sweet or spicy depending on the seeds used and is commonly used in meats, vegetables, sauces, and glazes.

While the ASPCA doesn’t consider the mustard plant toxic to cats, it’s generally not recommended for them. Eating mustard seeds may lead to severe gastroenteritis in cats, resulting in persistent vomiting and/or diarrhea. 

Additionally, the spicy flavor of mustard doesn’t sit well with cats, and its heat level might make them gassy and nauseous. Therefore, it’s advisable to avoid giving mustard to cats.

Also Read about: Can Cats Eat Pancakes? Guidelines For Cat Lovers.

mustard for cats

Disadvantages Of Mustard For Cats

  • Mustard Seeds: The main ingredient in mustard, mustard seeds, is generally considered harmful for cats if ingested.
  • Limited Licking: A bit of mustard licked off a plate might not cause major issues, but more significant amounts can be a concern.
  • Myrosinase: This enzyme is present in mustard seeds but becomes active only when the seeds are crushed or chewed. When activated, myrosinase breaks down other compounds in the seed, releasing additional irritants that can further upset a cat’s stomach.
  • Commercial Mustard: Store-bought mustard may contain additional harmful ingredients for cats, like garlic, spices, and salt.
  • Potential Health Issues: Ingesting mustard can lead to gastroenteritis in cats, causing inflammation, diarrhea, and vomiting.

What Should I Do If My Cat Eats Mustard?

is mustard bad for cats

If you catch your cat having more than just a few tiny licks of mustard, keep a close eye on them. Cats tend to be independent, so watch them closely, especially if they show symptoms alone.

Make sure your cat stays hydrated and keeps eating after mustard exposure. Encourage them to drink water, even though it might be tricky. This helps prevent dehydration during stomach upset.

If your cat appears to be in discomfort or is vomiting excessively, contact your vet for guidance on the next steps. Ensure to provide details on how much mustard your cat ate, size, and weight.

Remember that the severity of the reaction in a cat depends on the amount of mustard consumed. Generally, a tiny lick might not cause noticeable issues, but larger quantities increase the risk of gastrointestinal distress and potentially more severe complications.

Also Read about: Cat Not Eating Food But Eats Treats | Causes And Remedies.


Mustard is often used in cooking worldwide, but it’s unsafe for cats. They can’t digest it properly, which may cause vomiting and diarrhea.

A little mustard might not harm your cat, but watch for any signs of trouble and ensure she stays hydrated. To be safe, never feed your cat mustard, as it can be harmful to their health.


No, mustard is not safe for cats to eat.

Yes, mustard can be toxic to animals, including cats.

It’s not recommended to give cats sardines in mustard sauce due to the presence of mustard.

No, cats should not eat ketchup or mustard, as they can harm them.

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