Evadig
Free Ranging
that sounds more like coccidiosis than worms. Compare your birds' symptoms with description here
https://www.msdvetmanual.com/poultry/coccidiosis-in-poultry/coccidiosis-in-poultry
Thank you!That sounds like coccidia - which would also be found by a fecal float test and would not be cured by worming.