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What causes my dog's sensitive stomach and recurring bloody diarrhea?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 2 years and 6 months old | 30 lbs

Our 2 year old plott hound mix has a sensitive tummy. She’s been grain free for over a year and it helps a ton. Also daily doses of pumpkin works well. But every 3 to 6 months she will get diarrhea and sometimes it can be a bit bloody. She acts completely normal and it goes away as fast as it comes on. Any idea why?

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on March 21st, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Most dogs that have good allergies are actually allergic to the meat protein. Chicken being the biggest offender. I would suggest a non-chicken based food and if you prefer grain free you can find those. If you are already using a non chicken diet be sure that this is a strict diet, meaning no table food and all treats are non-chicken. You could also try a prescription hydrolyzed diet like Royal Canin HP, Purina HA or Hill’s z/d. OTC novel protein diets have been found to contain traces of chicken when tested. I hope this helps!

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