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Why Does My Dog Have Diarrhea and Loss of Appetite Despite Normal Blood Work?


Dear VetBabble,

I’ve recently taken my dog to the vet where they did blood work and found nothing wrong, but my dog still has uncontrollable diarrhea and doesn’t eat much. Have they tested a fecal sample? What could be the underlying issue?

Understanding the Causes of Diarrhea in Dogs

Dear concerned pet owner,

I understand your worry regarding your dog’s health, especially when they’re experiencing severe diarrhea. There are numerous reasons why a dog may suffer from diarrhea, and it’s essential to explore the potential causes and provide proper care to alleviate their discomfort. In this article, we’ll discuss the possible reasons behind your dog’s symptoms, when to be concerned, and what steps to take for better pet health.

First and foremost, it’s always crucial to communicate with your veterinarian regarding any major changes or ongoing symptoms in your dog’s health. If the blood work has come back normal, you can check with your vet if they have tested the fecal sample. A fecal test can help determine if the diarrhea is caused by an infection, parasites, or another underlying issue.

For more information on the various causes of diarrhea in dogs, you can visit Why Does My Dog Have Diarrhea?

When to Worry About Your Dog’s Diarrhea

It’s common for dogs to experience occasional diarrhea, but when it persists or is accompanied by other symptoms, it’s crucial to be proactive and closely monitor their health. Signs that indicate it’s time to worry about your dog’s diarrhea include:

  • Blood or mucus in the stool
  • Dehydration
  • Lethargy and weakness
  • Persistent diarrhea lasting over 48 hours
  • Vomiting

If your dog shows any of these concerning signs, it’s essential to seek veterinary advice as soon as possible. Your vet may recommend additional testing and treatment to determine the cause and help restore your dog’s health.

Find more information here: Diarrhea in Dogs: When to Worry

Potential Underlying Health Conditions

There are many potential underlying conditions that could cause persistent diarrhea, even if blood work comes back normal. Some possible health concerns in dogs include:


Diabetes in dogs is a common health issue that may lead to symptoms such as increased urination, thirst, weight loss, and diarrhea. Though blood work will often detect cases of diabetes, it’s essential to communicate with your veterinarian to rule out this condition if your dog’s symptoms persist.

Discover more about diabetes in dogs here: Diabetes in Dogs

Liver Disease

Liver disease is another condition that may cause diarrhea in dogs. Similar to diabetes, it can be detected through blood work, but sometimes additional testing may be needed to rule it out as a cause of your dog’s symptoms. Talk to your vet if you are concerned about the possibility of liver disease in your dog.

Learn more about liver disease in dogs: Liver Disease in Dogs

Remember that your veterinarian is your best resource for identifying the root cause of your dog’s symptoms. By collaborating closely with your vet, you can help ensure that your dog receives the best possible care for their specific needs. Never hesitate to discuss any concerns or questions you have and maintain regular check-ups to keep your furry friend happy and healthy.

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