In another thread I confirmed that we have cocci. I need some advice on my setup. We have a large coop. 24 adult chickens, one chickville with 23 4week old chicks, one brooder with 10 3-week old chicks. So far only the 4week chicks are affected. They are caged off in a corner in a chickville setting but are not allowed with the general population yet. However, we do walk in and out of there and then in the general area. First question: Do I only treat the chicks? If so, how long before the antibiotics are out of their system? Second question: Do I have to treat all of the other chickens? My people buy eggs from us because I don't use antibiotics. Isn't there any other way I can treat them besides antibiotics?