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My dog has painful yellow mucus stool and drinks a lot. Is it serious?

Updated On September 23rd, 2025

Pet's info: Dog | Cavalier King Charles Spaniel | Female | spayed | 12 years old

My cab has grade 6 heart murmur and last 24 h she's been pooing muscus covered stool, yellow in colour and very thick. She seems to be in pain before relieving her bowels whimpers in pain until she goes out. She's also been drinking a lot. We thought it was just somthing she ate. Her main diet is billed rice and boiled chicken. She's always been lathargic so there no change in movements. Will be off to the vets tomorrow if no change. Just worried it's somthing serious

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on January 17th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Lou! It sounds like Lou has bad diarrhea. Crying with urgency to defecate with diarrhea is normal. Causes of diarrhea can be from: parasites, viral or bacterial infections, pancreatitis, toxin ingestion, dietary indiscretion and sometimes we never find out the cause. I agree that she should see your Vet when they open. Since she is older and has underlying health issues it would be best for her. Most diarrhea is treated with oral antibiotics. Since she is already on a "bland" diet that won't change. Since she is older they may want to run blood work. I hope this helps and I wish Lou a speedy recovery!

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