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My dog has kidney failure, improved after antibiotics. Misdiagnosed?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 10 years and 5 months old | 23 lbs

My dog was diagnosed with kidney failure and given 2 days to live. They gave him an antibiotic shot "just in case he had a kidney infection". Despite his levels being off the charts it has now been a week and his eyes seem brighter everyday, his is alert and in good spirits, he has been eating/drinking, pooping/peeing and for the most part acting normal. What should I think about this?? Could he have been misdiagnosed?

1 Answer

Most Helpful Answer

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Answered By Anna M., DVM

Veterinarian

Published on April 20th, 2019

Hello, and thanks for your question. I’m so glad Henry seems to be doing a bit better! His appetite tells you a lot about how he’s feeling so that’s an important thing to monitor. It’s certainly possible that the antibiotic shot was more effective than the vet expected - and a kidney infection would be good news, since that’s more treatable than a majority of other kidney problems. Is it at all possible that Henry could have been exposed to something toxic and the vet care helped him turn a corner? I would definitely recommend rechecking his kidney values with your vet. Rechecking those values in bloodwork will be the best way to monitor how much improvement he may have made, and this is particularly important since he improved after the antibiotic. Kidney infections sometimes require a longer course of antibiotic therapy than a single shot would provide, so your vet may advise repeating the injection, or adding oral medication, to hopefully help Henry continue to improve. They may also talk about recommendations for continued fluid therapy - fluids are so important to help keep the kidneys happy! Hope this helps and you continue to see improvement in Henry!

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