Can Dogs Eat Mustard? Is It Good Or Bad For Dogs? | PUPPYFAQS

Can Dogs Eat Mustard? Is it Good or Bad for Dogs?

can dogs eat mustard?

No, dogs should not eat mustard. Mustard is a condiment we commonly put on our hot dogs. But, if you have a dog that loves hot dogs, you might also be wondering – can dogs eat mustard?

In this article, we will look at the pros and cons of feeding mustard to your dog so that you can look after your dog’s health during the summer months when hot dogs are most popular at barbeques and fairs, and your dog is most likely to come across mustard.

In this article, we will discuss the following:

  • Can dogs eat mustard?
  • Is mustard toxic for dogs?
  • Should I allow my dog to eat mustard?
  • What will happen if my dog eats mustard?
  • How will a vet treat a dog that has consumed mustard?
  • Can dogs eat honey mustard?
  • Is yellow mustard, dijon mustard, brown mustard, or mustard powder safe to eat

It is a great idea to check and find out if certain foods are safe for your dog to eat, especially if you think your dog is likely to have access to or has already ingested the food.

Unfortunately, there are plenty of human foods that are toxic or unhealthy for dogs, and these can be highly detrimental to your dog’s health, and in the worst-case scenario, the results can be life-threatening. 

It is a great idea to check and find out if certain foods are safe for your dog to eat, especially if you think your dog is likely to have access to or has already ingested the food. 

Unfortunately, there are plenty of human foods that are toxic or unhealthy for dogs, and these can be highly detrimental to your dog’s health, and in the worst-case scenario, the results can be life-threatening.

can dogs eat mustard?

Is Mustard Toxic For Dogs?

Mustard seeds are the main ingredient in mustard. Eating mustard seeds can lead to inflammation of the stomach or intestinal tract, known as gastroenteritis. The toxic component of mustard resides in the mustard seeds, which contain glucosinolates.

Therefore, the consumption of large amounts of this ingredient can induce adverse effects in your dog. If your dog eats a hotdog or hamburger with mustard on it, it might not have any symptoms. 

However, if you notice that he ate a large amount of mustard and is lethargic because of this, then be sure to call the vet right away.

Symptoms to be aware of:

  • Abdominal Pain
  • Diarrhea
  • Drooling
  • Gastroenteritis (inflammation of the stomach and intestines)
  • Vomiting

Is it safe for your dog to eat mustard greens?

However, it is only the mustard seeds that are toxic for your dog. Mustard greens are a different story.

Mustard greens and other cruciferous vegetables like cabbage and broccoli can offer plenty of health benefits for your dog. Mustard greens contain a variety of nutrients, like potassium, phosphorus, and fiber. 

Mustard greens, along with other cruciferous vegetables, should always be cooked before serving up for your dog. Never feed them raw. Your dog will not digest the mustard greens, and they may cause some gastrointestinal upset. 

Related Topic: Can dogs eat Ketchup?

However, when cooked, the heat softens the greens, and they are much safer for your dog to eat, not to mention more straightforward for them to digest.

Should you boil or steam mustard greens

If you would like to add mustard greens to your dog’s diet, you should steam them so that they retain their nutrients. Boiled vegetables lose all their nutrients in the water.

They then evaporate, meaning that there is no nutritional value in the cooked veggies and no point in feeding them to your dog apart from the fiber content. 

Steaming or blanching are your best options for preparing mustard greens and other safe greens and vegetables that you would like to feed to your dog.

 Do not feed these foods raw, though, because if you do, it may lead to the suppression of your dog’s thyroid function further on down the line. When boiled, steamed, or blanched, the fiber is soft and mashable. 

Related Topic:Can dogs eat french fries?

The nutrients, vitamins, and antioxidants and digest the food more effectively. Pureeing vegetables is an excellent idea to make them more digestible for your dog.

hotdogs with ketchup and mustard

What Will Happen If My Dog Eats Mustard?

Your dog may experience severe gastrointestinal upset. Your dog is more than likely to vomit and have diarrhea and discomfort due to gas and various forms of inflammation.

The more mustard or mustard seeds your dog has ingested, the worse their symptoms are likely to be. 

Mustard condiments contain many mustard seeds, so your dog will not have to eat very much of them to experience the adverse effects. Small dogs are especially at risk due to their small size and smaller digestive tracts. 

Therefore, a lesser amount of mustard can have a significant impact on a smaller dog. If you are concerned because your dog has eaten mustard, you should watch out for the main symptoms of stomach upset, including vomiting and diarrhea.

The signs of vomiting are:

  • Drooling
  • Licking the lips
  • Pacing
  • Lethargic

Signs your dog may experience diarrhea

If your dog is about to experience diarrhea, it may suddenly become restless or seem panicky and look for a way to get outside to release its bowels.

If your dog is feeling sick, they might stop responding to you or anyone else in the house. If this happens, it may be because of their low energy levels and discomfort. 

They could also hide somewhere and not eat any food or show interest in playing with toys either. If you press gently on your dog’s abdomen, your dog may also experience discomfort or pain. It would be best to be careful when doing this because some dogs may unintentionally lash out due to the pain, and you could get bitten. 

If your dog is exhibiting any of the following symptoms, you should call a veterinarian for advice. They may ask that you bring them in to examine the animal and run tests on it as needed. 

Don’t hesitate to call your vet, especially if your dog has been vomiting, as this can lead to dehydration and electrolyte inequalities, which in some cases can be fatal for your dog. The sooner your dog gets treatment, the better.

hotdogs with mustard

How Will The Vet Treat A Dog That Has Consumed Mustard?

If your dog has consumed a toxic amount of mustard, the first thing your vet will want to do is try to induce vomiting. Especially the case if your dog consumed the mustard just a short time before you brought them in to see the vet.

Induce Vomiting

Induced vomiting removes most of the toxic food from the dog’s stomach so that the body cannot absorb as much of the toxic compounds.

One of the main reasons it is essential to bring your dog in to see a vet as soon as possible is because the sooner this procedure takes place, the better chance your dog will have to avoid severe complications.

Activated Charcoal

Activated charcoal can be used to absorb any residual toxins in your dog’s system. First, the vet will give an injection, which causes the activated charcoal to immediately absorbs every toxin left behind and makes it easier for your pet to throw up everything out of its stomach.

Can Dogs Eat Honey Mustard?

You may wonder if honey mustard is safe for your dog to eat, as this is an ingredient commonly used to dress salads and marinate meats that your dog may also have the pleasure of sampling.

You may also be curious because honey is known to have multiple health benefits for both humans and dogs, helping to reduce painful infections, healing wounds, and increasing energy. 

In small amounts, your dog may not have any adverse effects on your dog’s health. However, the mustard will affect your dog’s gastrointestinal tract.

can dogs eat dijon mustard?

Can Dogs Eat Other Types of Mustard

As a general rule, your dogs should not eat mustard of any kind such as yellow mustard, spicy brown mustard, mustard powder, or Dijon mustard.

In America French’s yellow mustard is the most common condiment used on hotdogs and hamburgers. If your puppy eats a hotdog or hamburger with a small amount of yellow mustard you shouldn’t panic.


Can dogs eat mustard? Since mustard seeds are toxic to dogs in large amounts, it is a good idea to avoid any food that contains mustard or mustard seeds to keep your dog healthy and safe.

There are plenty of human foods that are toxic or unhealthy for dogs, and these can be highly detrimental to your dog’s health, and in the worst-case scenario, the results can be life-threatening. 

There will always be those dog owners that claim that their dog has eaten all of the toxic foods under the sun, including mustard, and that no harm ever came to them. 

If this is the case, then you should consider them and their dog very lucky, because the fact is that there are many dogs, big and small, who have become seriously ill and even died after eating toxic foods. 

Of course, you should avoid allowing your dog to eat food that you know is not good for them, but it’s better than nothing if they manage to sneak some in despite all precautions. There are plenty of healthy and safe options of food and treats for your dog, so there is never any excuse to put a dog’s health or life at risk.


I'm a self-employed blogger, life-long pet parent, and lover of dogs. I have always loved animals, especially puppies. So when my family got our first dog 15 years ago, it was love at first sight. We named her Sassy because she was so small, cute, and had a sassy personality! Once we got her home, I wanted to know everything about caring for her, so I researched online. Eventually, this led me to create the PUPPYFAQS website, where I write about nutrition, health, and care of puppies and the latest news in the world of puppies. In my spare time, I volunteer at my local shelter, which is run by volunteers who are passionate about helping homeless dogs find their forever homes. If I'm not working or volunteering for dogs, you can find me spending time with my family, friends, and my puppy. I have been writing professionally online since 2009. In addition to PUPPYFAQS, I also write for several other pet-related publications.

Recent Posts