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My diabetic dog has high glucose & bladder issues. Is it Cushing's?

Updated On September 23rd, 2025

Pet's info: Dog | Australian Shepherd | Male | neutered | 48 lbs

10 YO Australian Shepherd (Sam) was diagnosed diabetic about 4 months ago. Glucose levels have gone down but still high (in the 500s). Recently Sam has been unable to control his bladder and was treated for a bladder infection. Vet now saying that maybe he had been misdiagnosed and there may be a problem with his adrenal glands. Would that account for elevated glucose levels or would that be an issue on top of the diabetes?

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on January 13th, 2020

I'm guessing that the adrenal gland disease might be Cushing's, and it is a separate disease from diabetes although it is fairly common for dogs to have both diseases. Cushing's is caused by either the pituitary gland or the adrenal glands releasing hormones that result in excess cortisol. Cortisol causes insulin resistance so it can be difficult to regulate diabetes in dogs with Cushing's. A symptom of both diabetes and Cushing's is increased thirst and urination, and it is common for dogs with either disease to develop urinary tract infections.

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