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Why is my older dog losing weight and having trouble urinating?

Updated On September 23rd, 2025

Pet's info: Dog | Jack Russell Terrier | Male | unneutered | 12 years and 4 months old | 25 lbs

I have a 11yr old Jack Russell who is eating and drinking, and playing, but he has lost weight and seems to be having trouble urinating.

1 Answer

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on October 16th, 2017

Hi there and thank you for using Pet Coach to address your concern. Based on these symptoms I would recommend having Leo examined by a veterinarian so he can have testing performed to rule out the possible causes. I would want to see what his kidneys, liver and everything else are doing to ensure that there is no systemic illness leading to the weight loss. I would also recommend having his urine tested to ensure there is no urinary tract infection. With the difficulty urinating, I would be concerned that there may be a bladder stone, crystals in the urine, bladder tumor or other disease of the urinary tract. A urinary stone can cause a urinary obstruction which can cause many other problems, which is why it is best to have this looked at sooner rather than later. I hope this helps guide you in the right direction. Please do not hesitate to contact me if you have other questions.

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