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My puppy's diarrhea returned with blood. Could it be a food allergy?

Updated On September 23rd, 2025

Pet's info: Dog | Golden Retriever | Male | unneutered | 4 months and 15 days old | 35 lbs

My 4.5 month (30ish lb) Golden Retriever has been having vomiting and diarrhea issues the past week. Our vet visit resulted in all tests negative and meds to help with diarrhea. Meds are finished and diarrhea is back. Orange/yellow, pudding like, mucus, and occasional blood. Thinking it may be a food allergy? Considering changing his food to Zignature Salmon and Trout formula but worried he will miss out on important nutrients. Also not a positive diagnosis. What should i do?

1 Answer

Most Helpful Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on January 27th, 2020

Food allergy is possible, however some issues such as certain parasites (like giardia) can also sometimes require a second round of medication to fully address the issue. Adding in probiotics can also sometimes help with stool as well. Since the diarrhea is back and with blood in it, it would be best to recheck with your vet to see if Bruin needs another round of medication. I would also bring up potential allergy issues then (4 months is very young to have developed one, but not impossible). If medication isn't helping, your vet can help work on a plan of either an allergy med or a food trial to transition to the new food and see if there is an ingredient triggering it. While it's ideal to be on a large breed puppy food at this age, if there is an allergy, it's better to have that addressed with the right balanced diet that doesn't include that ingredient.

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