One of my 9 week old chicks was puffed up and not very active,her poop was a normal color but did seem to have a slimy texture.So,not knowing what else to do I started her on Coid to see if there would be any impovement.She already seems to be feeling better.I'm only treating her until I see a need to treat the others.When the chicks were a week old some had cocci,I read that once they had it wouldn't effect them again.I know she had it because the ones who did are stunted. I have one chick that is the same size as our 2 week old chicks.