As far as I understand, a chick can get cocci anytime. Is this chick still pooping this color? You might treat with Corid in the water for all of the chicks. I am not an expert and am hoping that some of them chime in here. Sorry cant be of more help.Is this dark poop Coccidiosis? I hatched these chicks from eggs in an incubator. Can chicks still have Coccidiosis if you hatch them yourself from eggs? These are my first chicks.