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Why is my puppy peeing so much after mushroom treatment and IV fluids?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | 2 months and 17 days old

My puppy seems to have eaten a toxic mushroom that gave him bad diarrhea and a big bout of vomiting. Our vet gave him activated charcoal and an IV and sub-q fluids, as well as soft diet Royal Canin food. He's doing better tonight overall but constantly has to pee and is hardly able to control his bladder to make it outside - he's usually very good. Is this normal due to the fluid treatment or flushing out the mushroom toxins? Should I be worried?

2 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on May 2nd, 2017

I'm sorry Fiddle ate a toxic mushroom, but good on you for taking him into the vet right away! Given that he had both an IV and sub-q fluids, it could be these fluids are what is causing him to have to urinate so much. I would keep an eye on him for now, and if he continues to have problems with this excessive urination in the morning, I would give the vet a call to see if they want you to bring him in.

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    Answered By Lindsey Edwards MVB, BSc, IVCA

    Veterinarian

    Published on May 4th, 2017

    Yes, steroids and iv fluids can both cause increased urination and the signs generally do resolve over 10-14days. If signs are not reducing over this time, blood tests to rule out kidney damage would be recommended

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