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Puppy has blood/mucus in poop, acting normal. Is coccidia treatment working?

Updated On September 23rd, 2025

Pet's info: Dog | Boston Terrier | Male | unneutered | 2 months and 4 days old | 20.5 lbs

After seeing my 9-week-old puppy had mucus and blood in his poop I took him to the vet right away. I've been treating him for coccidia with Albon for five days, and when his stools stayed the same the vet also prescribed Flagyl, of which he's just had his second dose. At no point has he been acting sick or uncomfortable. He's eating, drinking, playing, and sleeping like a normal, happy puppy. But the quality of his poop still hasn't improved. Do I need to be worried?

2 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on November 26th, 2016

As long as Bobo is eating and drinking, playful, and overall acting normal, I wouldn't be worried at all :) Coccidia can take a while to clear up in some cases, up to 10-14 days after starting Albon. The Flagyl should also help, but it often takes at least 48 hours to begin having any effect. So as long as your puppy is acting fine, I would just continue the medication as directed for the full course of treatment. If his stool is still runny once he has completed all of his medication, take him back to your vet for a recheck. If he still has coccidia at that point, he may need treatment with a different drug such as ponazuril to clear the infection.

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    Answered By David Elbeze, DVM, MRCVS

    Veterinarian

    Published on

    I think you need to give the Flagyl a little longer, it sometimes takes a week to take effect, and as long as Boho is fine in himself I wouldn't be too worried yet. An infection is the most probable cause, but 8f it doesn't go away he will need some tests (faecal, bloods) in order to rule out other possible conditions.

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