The cat wants to eat bread with mustard

Can Cats Eat Mustard?

Mustard, a popular condiment enjoyed by many, may seem harmless.

However, when it comes to our furry companions, the question of safety arises.

So, can cats eat mustard?

Quick Answer:

No, cats should not eat mustard. While a small lick or two might not cause immediate harm, mustard seeds, the main ingredient in mustard, contain isothiocyanates and glucosinolates, which are toxic to cats.

Why Mustard Is Harmful to Cats

There are several reasons why mustard is harmful to cats:

1. Toxic ingredients:

Mustard seeds, the main ingredient in mustard, contain isothiocyanates, which are toxic to cats. These compounds can irritate the digestive system and lead to symptoms like vomiting, diarrhea, and abdominal pain.

2. Upset stomach:

Even small amounts of mustard can upset a cat’s sensitive stomach. The spices and acidity in mustard can cause digestive problems and discomfort.

3. Allergic reactions:

Some cats are allergic to mustard seeds or other ingredients in mustard, which can trigger allergic reactions such as itchy skin, hives, and difficulty breathing.

4. Respiratory issues:

Inhaling mustard powder can irritate a cat’s respiratory system and cause coughing, sneezing, and difficulty breathing.

5. Additional risk factors:

The amount of mustard ingested, the type of mustard (pre-made or dry powder), and the age and overall health of the cat all play a role in the severity of symptoms.

Even a small amount of mustard can be harmful to cats, so it’s best to err on the side of caution and avoid giving it to them altogether.

Dr. Sarah Reynolds, a veterinarian at the Animal Medical Center in New York City

Signs of Mustard Poisoning in Cats

If your cat ingests mustard, keep an eye out for the following signs of poisoning:

  • Upset stomach: Vomiting, diarrhea, and loss of appetite
  • Discomfort: Abdominal pain, restlessness, and excessive thirst
  • Lethargy: Weakness, fatigue, and lack of energy
  • Breathing difficulties: In severe cases, rapid breathing or gasping
  • Gastrointestinal bleeding: Blood in vomit or stool

What to Do if Your Cat Eats Mustard

If you suspect your cat has eaten mustard, follow these steps:

1. Do not induce vomiting:

This can worsen the situation and irritate the digestive tract further.

2. Remove any remaining mustard:

Clean up any spilled mustard or wash the area where your cat might have licked it.

3. Contact your veterinarian:

Provide them with information about the type and amount of mustard ingested, along with any symptoms your cat is experiencing.

4. Follow the veterinarian’s instructions:

They will advise you on the best course of action, which may include monitoring your cat at home or administering medication.

Preventing Mustard Consumption

To prevent your cat from ingesting mustard, take these precautions:

1. Store mustard securely:

Keep all mustard condiments and dry mustard powder out of your cat’s reach, preferably in high cabinets or closed containers.

2. Clean up spills immediately:

If you spill any mustard, clean it up thoroughly to prevent your cat from licking it up.

3. Supervise mealtimes:

If you enjoy mustard with your meals, keep your cat away from the table to avoid any accidental ingestion.

Alternatives to Mustard for Cats

If you’re looking for cat-friendly treats, there are many delicious and safe options available. Consider these alternatives:

  • Commercial cat treats: Choose treats specifically formulated for cats and avoid those containing artificial ingredients or sugars.
  • Cooked chicken or tuna: Offer small portions of cooked, unseasoned chicken or tuna as a special treat.
  • Fruits and vegetables: Some cats enjoy fruits like bananas or blueberries, and vegetables like carrots or green beans.
  • Catnip: This herb can be a stimulating and enjoyable treat for many cats.


While a small amount of mustard is unlikely to cause serious harm to your cat, it’s important to remember that it is not a safe food for them.

If you suspect your cat has eaten mustard, contact your veterinarian immediately for advice and treatment.


What type of mustard is most dangerous for cats?

All types of mustard contain mustard seeds, which are the source of the isothiocyanates that can harm cats.

Are there any commercially available cat treats that contain mustard?

While there are a wide variety of cat treats available, it’s unlikely that you will find any that contain mustard.

Can I use mustard as a deterrent to keep my cat off furniture?

Using mustard as a deterrent to keep your cat off furniture is not a good idea.

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