Two days ago I was doing a routine check on the birds, my orps and welsummers were very actively staying out of my reach which is normal, except my welsummer pullet. She let me catch her, which she never does. She was a little light. I noticed in one spot a small bit of bloody stool and started to investigate in my books. Such a sight was not welcoming as I believe it to be coccidiosis. I went to the store and picked up sulfamet 12.5% and started it in the water yesterday. I lost my pullet, I pulled her out of the coop right away and isolated her. I checked all my other babies and they are light. They had just moved to the coop a week and 1/2 ago. I never had this problem with the first batch of chicks who are now 11-12 weeks old in the same area. I think that the bigger chicks are not letting the younger ones near the feed troughs and that is just part of the problem. I thought they were getting enough since they were always hiding out in the feed area, but I wonder if someone was terrorizing them on purpose, while the rest of the flock was outside enjoying their new run. Management of the area is usually fluffing the litter, putting pdz down to help dry out and removing wet areas. The chicks are also on medicated feed from Nutrena called Nature Wise. They have only been on this for the past 2-3 weeks. The only thing that gets wet was near the water container. I have since moved it and placed it even higher, since the tray it was on kept stagnant water in place for too long. I am considering pulling the rest of my chicks and putting them up in the garage until they get through this. What else can I do? I don't know if putting ACV with the Sulfamet is a good idea and I want to try and plump them up and help them get their weight back. I am afraid I will probably lose more, my welsummer cockeral is not looking good right now, so I guess I am just trying to keep my losses to a minimal. Any advice or help????