I went down this morning and noticed some bloody poo in my broody coop that has a hen and 7 chicks in it. The chicks are 4 weeks old. I haven't noticed them being lethargic or anything, but they are a little "ratty" looking which I attributed to them starting to feather out. I know that I need to treat everyone in the coop, and probably everyone else because they have access to the area around the coop and under it. What do I need to use and what is the dosage? I am not getting any eggs right now, but if they start laying while under treatment how long do I need to throw those away? Any help is greatly appreciated because I really don't want to lose any of these chicks!