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Why is my dog vomiting, not eating, straining to pee after AZO?

Updated On September 23rd, 2025

Pet's info: Dog | Great Dane | Male | unneutered | 8 years and 10 months old | 120 lbs

My dog Zephyr has been having trouble dealing with the loss of his lifetime companion Ben. He has been doing physically well until recently. He developed what looks like a uti that ive bern treating with AZO pills. But the past day or so, he has vomited up his food and has been uninterested in eating since. Still the frequent, strained peeing and he can poop, but why wont he eat?

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on June 3rd, 2019

AZO tablets are not recommended for dogs and cats, although a single standard dose would probably not be toxic. It’s possible that Zephyr is vomiting secondary to what is now a kidney infection, or that his straining is caused by prostate disease or bladder stones. I would recommend seeing your veterinarian. They can check Zephyr’s prostate and check a urine sample.

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