Causes of Vomiting And Diarrhea In Dogs


If you are a dog owner, then you may have noticed that your dog has occasional and random episodes of vomiting and diarrhea. Most of the time, it is nothing too much serious as there are some foods that just don’t go well with dogs. However, a concern arises when a dog is vomiting and has diarrhea frequently, and for a long time.

This can be dangerous for your dog and may even turn out to be a life-threatening situation. As a pet owner, you should know all about ailments, causes, and cures so that you can give your dog a healthy lifestyle and remain fully aware of your dog’s health.

In this article, we have discussed the major underlining causes and also some rare medical conditions that might be associated with your dog’s vomit or nausea. We have also provided signs and symptoms to look for if chronic vomiting and diarrheic disease is suspected. In the end, we do advise you to take your dog to a professional vet and avoid self-diagnosing and self-treating your dog.

Common Symptoms

Here are some of the most common symptoms which can foretell an underlying problem with your dog’s digestive system.

  • Foreign bodies appearing in the vomit like sticks, garbage, paper, etc.
  • Vomit has dark goo that looks like black slime.
  • Red-colored vomit that contains blood.
  • Dark-colored feces can indicate internal bleeding in the stomach.
  • Extremely watery diarrhea that contains yellow bile and mucus. This is also an indication that your dog can have a problem in its colon.
  • Blood clots in feces, which is an indicator of a problem in the lower digestive tract.

Causes of Vomiting and Diarrhea in Dogs

There can be many reasons as to why your dog is experiencing trouble with its stomach. Mostly, the reasons are not so much so worry about and are only temporary. Some of them, however, are indicative of a more serious condition. The general rule is that you should be worried if your dog has been vomiting and having diarrheic episodes for more than a day.

Here are some of the reasons why a dog may have such illnesses:

Reaction to Some Foods

Not all foods go well with a dog’s system. If you are feeding your dog with foods that don’t agree with its stomach, then you are unknowingly subjecting him to such illness. Following are some of the most common  allergens:

If this is the case, your dog may have such episodes more often and you might think that it is a serious condition; but it may be nothing more than an imbalanced gut. It is advisable to change your feeding habits and see how it works out for you.


Dogs are very sensitive creatures. They can get more stressed than we humans do. Stress has the same effect on a dog’s stomach as it will have on yours. Ever had diarrhea when you had a bad day at work that made you feel even worse? It’s the same with dogs. If there are stressful situations at home, like you are shifting places or maybe you are not giving enough time to your dog; then that can subject your dog to anxiety which can create stomach issues.


A dog may also be experiencing vomiting or diarrhea owing to some viral infection like the Rotavirus which is very common in dogs. You should be a bit concerned if it is a viral infection as it needs proper treatment. We advise that you take your dog for the shots and have him checked annually.


Species from the nematodes and Platyhelminthes are the most common type of parasites found in a dog’s stomach, for example, the roundworm and the tapeworm. These types of parasites can block the gastrointestinal tract and are a major cause of vomiting.

Organ Failure

In older dogs, there might be a possibility that they are suffering from organ failure. In the case of liver or kidney disease, your dog can have occasional diarrhea and vomiting. This is a life-threatening situation and we advise immediate attention from your vet.

Inflammatory Bowel Disease (IBS)

IBS disease is one of the major underlining conditions that affects 30 percent of all humans, dogs, and cats. The condition is not caused by any kind of foreign entity rather it is a functional disorder that affects the lower digestive tract by causing inflammation. Normally it is nothing that you should worry about too much. But sometimes  in serious cases, where there is blood or mucus in the stool, it can be an indicator of a more serious condition.


Dogs are just as susceptible to digestive disorders as we humans are. This article has provided some of the common causes of a dog experiencing vomiting and diarrhea so that you can look for the symptoms associated with the condition, and then decide to take your dog to the vet. We advise against self-treatment if you are not a professional.

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