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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.

2 Answers

Most Helpful Answer

Daniel Fonza, DVM

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.
Vote Icon1Pet Parents found this answer helpful

Related Answers from Veterinarians

  • Answered By Lindsey Edwards MVB, BSc, IVCA

    Veterinarian

    Published on August 15th, 2018

    Weight loss, difficulty urinating and constipation are concerning, especially when progressive. I would recommend pelvic xrays and possibly ultrasound to check for any obstruction such as bladder stones or growths

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    1Pet Parents found this answer helpful

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