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My dog has diarrhea with black, yellow, clear poop. Should I worry?

Updated On September 23rd, 2025

Pet's info: Dog | Blue Heeler | Male | unneutered | 1 year and 5 months old | 30 lbs

My dog is having extremely explosive diarrhea. Started about 4 hours ago. It changes from clear like glue too bright yellow and then black. Then goes back to yellow and clear.. Should i be worried? Both spots in the picture are his poop

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1 Answer

Most Helpful Answer

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Answered By Kevin Sanada, DVM

Veterinarian

Published on February 1st, 2018

Black stool can indicate bleeding in the upper gastrointestinal tract. Considering this, I would be worried about a serious infection. If Tuxedo has any of the following, then it's best to take him to a vet right away: 1) Starts acting very depressed 2) Stops eating or drinking for longer than 24 hours. 3) Pale or yellow gums Otherwise, he can wait to go to the vet sometime in the next 24 hours. You can help him get through this by feeding bland food (boneless chicken and rice is good). Feed small portions (1/2 cup or less) three times a day. You can also add probiotics to the food (can get this at the pet store), which has demonstrated some efficacy for improving diarrhea. Dehydration is the biggest concern with profuse diarrhea. Ensure fresh, clean water is always available. Oral rehydration salts or pedialyte can be added to the water to help keep him hydrated. I hope this helps and Tuxedo gets better soon.

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