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My dog is still sick: lethargic, diarrhea, not eating. Vet again?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 1 year and 10 months old | 21.8 lbs

Having already had an anti-sickness injection 24hrs ago after a spell of vomiting, our dog is now very lethargic and has had diarrhoea twice today. He has not been very interested in food and is now shivering on and off as he lays. He does seem himself most of the time but does also seem quite sad. Could this just be the end of a potential bug he has had, or is it worth taking back to vet for further treatment?

5 Answers

Most Helpful Answer

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Answered By David Darvishian

Veterinarian

Published on August 4th, 2017

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear about Kobe. Sounds like he needs to be evaluated again. Many things could be going on including intestinal worms, infection, a foreign body, pancreatitis, etc. Your vet can evaluate Kobe and then recommend some tests such as a fecal exam, blood work, and possibly x-rays to determine what is wrong. Good luck and I wish you the best with Kobe

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4Pet Parents found this answer helpful

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    Answered By Dr. Macartney, BVet Med, MRCVS

    Veterinarian

    Published on

    I am very sorry to hear that Kobe is still not feeling 100%. I woudm hope this is the tail end of the infection. I would try tempting him with a bland and easily digestible diet of boiled boneless chicken breast and bland rice. If after a few more hours he still refuses to eat, continues to have vomiting or diarrhoea, you notice any fresh blood, he seems depressed or in pain I would take him back to see the veterinarian.

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on December 29th, 2018

    Diarrhea and throwing up can be caused by a food sensitivity, dietary indiscretion, intestinal parasites, an intestinal blockage, bacterial infection, viral infection, the weather, food change, stress, etc. As Boris is not feeling well and is lethargic, he needs to see a veterinarian for an exam as there may be something more serious such as an infection going on.

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    Answered By Laura Johnson VMD

    Veterinarian

    Published on February 18th, 2018

    Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Kobe! With severe vomiting and diarrhea blood can develop. In the vomit that is due to ulceration of the stomach lining and in the stool it is secondary to inflammation in the colon. I would not give Kobe food for 24 hours. With hold water for 6 hours. If he stops vomiting during the 6 hours you can start small sips of water. If he continues to vomit then he should go to an Emergency hospital today. If all goes well with the water then at 24 hours start a bland diet of rice with boiled hamburger. Feed 1 cup per 20 lbs per day as small frequent meals. Feed the bland diet until 2 normal stools then transition him to the non chicken diet. If he won't eat, continues to vomit and/or is lethargic he should be seen by a Vet. I hope this helps and I wish Kobe the best!

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    Answered By Ana M, DVM

    Veterinarian

    Published on June 17th, 2018

    Thank you for submitting your question regarding Kobe. He will need to see his veterinarian as it does not sound like his diarrhea is resolving. I usually start with fecal testing to look for intestinal parasites, another infection or a bacterial overgrowth. This allows me to know which medication to prescribe. A lot of times I will send home a probiotic as well. In most cases, this will resolve the issue. In the meantime, it is generally safe to withhold food for 18-24 hours if he is otherwise healthy. This will rest the gastrointestinal tract and can potentially resolve the diarrhea. Be sure to provide plenty of water so that he does not become dehydrated. I hope this information helps!

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