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Why does my senior dog have mucus in his stool? Is it worms?

Updated On September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | neutered | 12 years and 4 months old | 9.3 lbs

Is it good to deworm my senior pet.? He’s been liking but hS stopped now. Mucus is in stool. I do not see worms

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Answered By Ana M, DVM

Veterinarian

Published on October 27th, 2019

Thank you for submitting your question regarding Toby. While parasites can occur in any dog, they are less likely in senior pets. Mucus in the stool typically indicates inflammation in the colon. I recommend that he sees his veterinarian to determine why this has happened to him and what the most effective treatment would be. I hope this information helps!

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