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My 6-week-old puppy has diarrhea with blood and mucus. Is it serious?

Updated On September 23rd, 2025

Pet's info: Dog | Catahoula Leopard Dog | Male | unneutered | 1 month and 12 days old | 12.7 lbs

Hi! So I just got a 6 week old puppy (louisiana catahoula) on friday, and he got his first round of puppy shots (DHLPP) and Kennel Cough. Then we gave him his Bordetella pill and flee/tick prevention pill on Saturday. My puppy has been having diarrhea since Saturday and now his diarrhea is getting runnier and runnier and now contains some blood and mucus. Should I be worried?

1 Answer

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on April 22nd, 2019

Thank you for submitting your question regarding Nashville. I recommend that he sees a veterinarian. Blood and mucus in the diarrhea can be a serious sign in such a young puppy. He will likely need fecal testing to look for infectious causes of the diarrhea. I also worry that he will be dehydrated from losing excessive fluid in the stool. Based on his exam findings, medication and other necessary treatment can be prescribed. I hope this information helps!

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