No that won't treat cocci, not at all. You need CORID or something called Cocci-Rid, which is Amprolium in concentrated form as others just said. I do not feed medicated chick starter because it truly does little to control coccidiosis anyway because it is in super low doses, only to prevent, not to treat an active case, and I treat with Corid if I see signs of it as they grow.I gave her medicated chick starter that has Corid in it.
Are you sure? I've bathed my chickens for a long time and I've had no death/sickness issues. Neither have people I know/heard of who do it.