Coccidiosis and Negative Fecal test

[ChixHaven]

I treated my flock with Corid at the 2t/gallon dose for 5 days after one of them manifested 'classic' coccidiosis bloody poops. Poops went back to normal after 2 days of treatment. My vet said NOT to continue treatment beyond the 5 days, unlike the guidance here, so I did not, and 2 days past treatment, the bloody diarrhea returned. My vet ordered a fecal test upon the return of the bloody poops, 2 days beyond Corid treatment, the results were negative for any intestinal parasites. Are false negatives common with fecal tests for parasites? Or does Coccidia always show up in results if it is present?

 

[Wyorp Rock]

How old are the birds?

Photos of the poop?

You can ask your vet about false positives. Did he have an explanation for blood in the poop or give you suggestions for treatment?

If the flock is adults and they were mine, I'd treat for worms if I saw bloody poop.

If they are chicks and had a round of Amprolium and I still saw bloody poops, then I'd treat with Endocox (Toltrazuril).