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Why is my dog not eating with a UTI and possible mast cell tumors?

Updated On September 23rd, 2025

Pet's info: Dog | American Bulldog | Male | unneutered | 7 years and 10 months old

my dog has been diagnosed with urine infection hes had antibiotic jabs and a steroid he ate yesterday after days but not today my vet thinks he may have mast cell tumours inside as he has had quite a few taken off skin they said if so theres nothing they can do im devastated wot do u think he appears very unwell at mo

1 Answer

Most Helpful Answer

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Answered By Lauren Kennedy, DVM

Veterinarian

Published on August 13th, 2017

I'm so sorry to hear that all of this is going on with Hatton. Firstly, it can take several days for the antibiotics he is on to clear up the infection. You may not see improvements in his UTI until 3-5 days after starting the medication. Additionally, antibiotics need to be given for a minimum of 2 weeks to clear up a simple infection, but some infections take 4-6 weeks of treatment. Hatton may also have bladder stones. If this has not been ruled out you may consider having X-rays to looks for stones. The antibiotics may be giving Hatton an upset stomach as well and this could be why he is reluctant to eat. You may want to consider asking your vet to prescribe him some nausea medication and see if that gets him eating again. Secondly, if you or your vet is concerned about the spread of mast cell tumors throughout the body I would consider doing chest X-rays and an abdominal ultrasound. Both of these tests can help identify metastatic lesions. I hope this helps and I hope Hatton gets back to himself soon. Best of luck.

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