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My dog has a mass and nodules but acts normal. Will he get worse?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | 9 years and 10 months old | 99 lbs

Hello. Yogi has this mass on his chest with nodules in his lung lobes and liver. He is however acting completely normal, going on walks, eating and in no apparent discomfort. He subsequently isn't currently on any medications. Is this normal? And should we expect him to go downhill soon/in the near future? Should this mass be causing him discomfort? He is breathing fine and doesn't seem to have his initial cough anymore except when overly exerting himself. Many thanks for your time

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2 Answers

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on May 12th, 2018

Thank you for submitting your question regarding Yogi. I am sorry to hear of his recent diagnosis. It is wonderful that he is still feeling well. I do not suspect this will be the case for long, as the mass and fluid will ultimately interfere with his ability to breathe. If treatment is not possible, it will continue to grow. I would suspect this to happen within 1-3 months. You can consider pain medication if his attitude or appetite changes. His veterinarian can prescribe something for him. In the meantime, enjoy all of your time with him.

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    Answered By Ana M, DVM

    Veterinarian

    Published on August 26th, 2018

    Thank you for submitting your question regarding Yogi. How frustrating to not have any definitive answers regarding his condition. I am happy to hear that he is still doing well for you at home though. Unfortunately, regardless of the exact cause of his lesions, I suspect that he will begin to deteriorate. The lesions appear extensive and have the possibility to ultimately interfere with his breathing. I encourage you to enjoy him and make as many memories with him as possible. I have had some families created a bucket list of things to do with an aging pet. Best of luck.

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