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What to Do When Puppy Stops Eating and Has Diarrhea: Vet Advice?


Dear VetBabble,

What should I do if my puppy is not eating and has liquid poop? I’m worried about their health and want to make sure they get better soon. Are there any common reasons for this issue?

Introduction to Puppy Health Concerns

When you bring a new puppy into your life, their health and well-being is a top priority. It’s understandable to feel concerned when your puppy is not eating and has diarrhea, as these issues can quickly affect their overall health, especially in young puppies with minimal energy reserves. In this article, we will explore the possible causes of these symptoms and discuss what actions pet owners should take to help their furry friends feel better.

Common Reasons for Lack of Appetite and Diarrhea in Puppies

There are several reasons why a puppy may lose their appetite and experience diarrhea. Some common causes include bacterial or viral infections, food intolerances, and dietary changes. Let’s take a closer look at each of these potential culprits:

  1. Bacterial or viral infections: Puppies are more susceptible to infections than adult dogs due to their developing immune systems. A variety of infections can cause a loss of appetite and diarrhea in puppies. One such article on “Why Won’t My Dog Eat?” provides some insights into how infections might affect your puppy’s appetite.
  2. Food intolerances: Some puppies may develop an intolerance to certain ingredients in their food, leading to gastrointestinal issues such as vomiting, diarrhea, and loss of appetite. If you suspect a food intolerance, try offering a bland diet or a different protein source to see if the symptoms improve.
  3. Dietary changes: Puppies have sensitive stomachs, and a sudden change in diet can cause digestive issues, including diarrhea and loss of appetite. Always introduce new foods slowly and gradually to reduce the risk of gastrointestinal upset.

Understanding the potential causes of your puppy’s symptoms can help you identify the underlying issue and take appropriate action. If you’re unsure whether your puppy is simply tired or if their lack of energy is a sign of a more serious issue, consult the article titled “Is My Puppy Tired or Lethargic?” for guidance.

When to Take Action and Consult a Veterinarian

It’s crucial to monitor your puppy closely if they are not eating and have diarrhea, as young dogs can quickly become weak and dehydrated. A full health check is always advised for any young puppy displaying these symptoms. As mentioned in “Why Does My Dog Have Diarrhea?,” some cases may require veterinary intervention.

If your puppy’s symptoms are severe or persist for more than a day, it’s essential to consult your veterinarian. They can help diagnose the cause and develop an appropriate treatment plan. In some cases, your vet may recommend diagnostic tests such as blood work or fecal analysis to determine the underlying issue.

For further information on when you should be concerned about your dog’s diarrhea, read “Diarrhea in Dogs: When to Worry.”


In conclusion, a puppy not eating and having liquid poop is a cause for concern, and prompt action should be taken to address the issue. Monitoring your puppy closely, providing appropriate care, and consulting with a veterinarian when necessary can help ensure your puppy’s health and well-being. Stay informed about your pet’s health, and don’t hesitate to seek professional advice when needed.

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