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My dog is lethargic, not eating, and has diarrhea. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 66 lbs

On Friday evening my dog did not eat dinner. He then did not eat breakfast Saturday morning. Saturday night he had most of his food but then no breakfast Sunday. He ate dinner Sunday night but no breakfast today. He seems to be lethargic and feels warmer than our other dog. He has loose stool and after he poops he squats there like he has more but nothing. Any help or direction would be helpful. Thank you

2 Answers

Most Helpful Answer

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Answered By Stacey Anstaett, DVM

Veterinarian

Published on July 22nd, 2019

It sounds like Moose may have some gastro-intestinal upset. You didn't mention vomiting-- If there's been no vomiting then that is good. However, decreased appetite and the loose stools are concerning. When the colon (large intestine) is inflamed, sometimes they feel like they need to poop even though there isn't anything more coming out. As for what may be causing the GI upset, it could be gastroenteritis which is inflammation of the stomach and or intestines-- this could be from eating something out of the ordinary such as getting into the garbage or eating mulch, etc, or it may be secondary to anything from kidney disease to cancer. I don't see Moose's age listed; if he is older, the concern that there is a more serious underlying problem is higher. If he is a younger dog, gastroenteritis is more likely. Since he seems lethargic, I strongly recommend that you take him in to the vet at your first convenience. If the lethargy is getting worse, or if he starts vomiting or having blood in the stool or vomit, seek emergency care. If you are unable to take him to the vet, you can offer a bland diet (boiled chicken and white rice) for a couple of days and see if that helps. If it is not improving, please get him in for an exam. Thank you for asking Petco Pet Education Center, formerly Petcoach!

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    Answered By Dr. Elizabeth

    Veterinarian

    Published on

    It sounds like Moose has not been feeling well for several days. There are many reasons why he may not feel well and it’s possible this is all related to the diarrhea. I recommend to have him examined today and his stool tested for parasites and bacterial over growth. For many pets, when diarrhea continues beyond 2 days there are often shifts in the bacterial flora that cause continued problems with diarrhea regardless of the initial cause. Many times these pets needs probiotics and often antibiotics. A bland diet will also help. Since there are so many different causes of diarrhea, other diagnostics may be recommended. After a physical exam and a thorough medical history, Moose’s doctor will have a better idea of the cause. I hope this helps and best of luck.

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