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Why is my senior dog peeing inside with hypothyroidism and Horner's?

Updated On September 23rd, 2025

Pet's info: Dog | Beagle | Male | neutered | 10 years and 6 months old | 36 lbs

10 yr old beagle being treated for hypothyroidism past 4 years, recently began peeing in the house he tested positive for blood in urine and protein Vet ruled out diabetes and kidney disease gave an antibiotic peeing stopped once off the antibiotic he began peeing and and now has signs of Horners syndrome, Vet did X-ray rules our cancer, retested urine noore blood still protein lowered thyroid med dosage from .5-.3 based on weight (34lbs). What is wrong with my baby?

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1 Answer

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Answered By Jenny, DVM

Veterinarian

Published on October 4th, 2017

Hornets syndrome can resolve on its own and the cause is not always identified. However it sounds like an ultrasound should be done next along with a UPC ratio to establish where the protein is coming from and to look inside the kidneys and bladder to check for growths or changes in thre architecture. They can also check for Cushings disease or other endocrine problems. It may be worth consulting with a specialist in your area since more advanced testing is needed

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