Great Dane Throwing Up And Diarrhea: Here’s What You Need To Do

A Great Dane throwing up and simultaneously having diarrhea is not a good sign. Great Danes sometimes throw up blood, white foam, yellow form, bile, mucus, or after eating and drinking.

But with diarrhea, it’s unusual. So, why throw up and have diarrhea?

In this article, we will explain why a Great Dane throws up alongside having diarrhea.

Great Dane Throwing up And Diarrhea: The Reasons Why This Occurs

A Great Dane throwing up and having diarrhea often occurs because of an upset stomach due to inflammation or irritation caused by their diet or a health condition. 

The health conditions and situations that may cause a Great Dane to throw up and diarrhea include:

  • A sudden change of diet
  • Food intolerance or allergy 
  • Gastrointestinal infections ( viruses and bacteria)
  • Inflammatory bowel disease
  • Ingestion of toxins
  • Stress
  • Gastrointestinal obstruction
  • Intestinal parasites
  • Dietary indiscretion (eating what they are not supposed to eat)
  • Pancreatitis
  • A reaction to a medication
Great Dane Throwing Up And Diarrhea

What To Do

When your Great Dane throws up alongside having diarrhea and if there is no blood in the vomit or stool, the first action is to monitor them at home.

Withhold feeding them for 24 hours to allow their stomach to settle down and heal. During this time, only provide them clean drinking water.

If there is continual vomiting and/or diarrhea, seek medical attention within 8 -12 hours after the onset of the vomiting and diarrhea.

And if vomiting and diarrhea reduce after 24 hours, introduce a bland diet consisting of boiled white rice with boiled chicken. If after eating they still vomit and have diarrhea, contact your veterinarian.

Immediately contact your veterinarian when you notice any of the following symptoms:

  • Blood in the vomit or stool
  • Loss of appetite 
  • Abdominal pain
  • Signs of dehydration (dry gums) 

Read more here on what leads to a Great Dane throwing up.


The severity of throwing up and diarrhea depends on the length of time and presentation of other symptoms which indicates a serious health condition as the underlying cause.

Great Dane throwing up with diarrhea most of the time is due to an upset stomach and the symptoms pass after the initial treatment with bland food.

In some cases, the situation takes a turn and a Great Dane may continue vomiting and having diarrhea after 24 hours of monitoring their condition. 

In this case, medical attention by a veterinarian is required. Diarrhea and vomiting cause a dog to lose water and electrolytes which leads to severe dehydration, which is life-threatening.

The initial treatment consists of the provision of anti-nausea medication to stop the vomiting, pain relief medication in case of abdominal pain, and antacids.

If a Great Dane is dehydrated, intravenous fluids are provided for rehydration and replacement of lost electrolytes.

The treatment provided also depends on the results of the tests conducted to determine the underlying cause of the vomiting.  


How To Prevent A Great Dane Vomiting and Diarrhea

There are preventive measures to prevent a Great Dane from throwing up and diarrhea. This includes:

Slow transition to a new diet

Great Dane throwing up and diarrhea is usually due to a sudden change of their diet, which leads to stomach upset because a Great Dane’s stomach has not adjusted to the new food. 

To prevent this from happening, always consult with your veterinarian on any diet change and introduce a new diet or food slowly for 5-7 days to allow your dog’s stomach to adjust to the new food. 

This can be done by mixing the new food in small amounts into the current food and gradually fully replacing the current diet.

Also, monitor your dog’s diet to observe whether diarrhea and vomiting are due to their current diet. In most cases, diarrhea is triggered by a Great Dane’s diet. 

Some diets contain ingredients that may cause indigestion, food intolerance, or allergy. With the help of your veterinarian, you can identify the diet as a problem and be able to change their diet.

Related: Great Dane Bloody diarrhea: What it means

Stress management

Throwing up and diarrhea due to stress can be prevented by relieving your Great Dane from stress triggers, which will calm them down.

Stress triggers include a change in their routine, meeting new people, or being in a new home.

Other methods to relieve stress include exercise, stress management training, and music therapy. These will help a Great Dane to manage stress better.

Prevent access to toxins

Ingestion of household products such as cleaning products, antifreeze, or garden chemicals causes throwing up and diarrhea.  

These products are potential toxins to your Great Dane and should be securely kept away to prevent your dog from accessing them.

Keep up with routine check-ups

When health conditions are discovered early, they can be treated and/or managed which prevents a Great Dane from developing conditions that can result in vomiting and diarrhea.

Therefore routine health checkups are important to allow your veterinarian to examine your dog to ensure they are healthy and continue to thrive.  


A Great Dane throwing up and having diarrhea is concerning to any Great Dane parent. These two symptoms can quickly dehydrate a dog which can be fatal.

Vomiting and diarrhea can be due to underlying health conditions especially if other symptoms are also present. If your Great Dane has other symptoms, and vomiting or diarrhea is continuous, always seek medical attention. 

There are also ways you can put in place to prevent your Great Dane from throwing up and suffering from diarrhea. 

By following the tips discussed above, such as keeping an eye on what your dog eats, managing stress, or preventing access to household products, you can prevent vomiting and diarrhea from occurring.


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