A few weeks ago one of my hens wasted away, she was already too light by the time I noticed. Seemed like cocci so I started sulmet treatments and nobody who seemed healthy got sick, but one BSL who also had the diahrea now only seems slightly better. She hasn't lost weight, or appetite, although she has been cackling a lot and doesn't seem 100% either. She also has some feather loss and red skin in the front neck area, and the rear below the vent also is showing red skin, although I have not seen mites or anything. They roost in the air, and have an old tire filled with sand and I have sprinkled diatomaceous earth on it. I dont know if I am battling one thing or two... I really dont want to lose the BSL, that would mean none of my birds have lived even a year with me. Any suggestions? Thanks in advance.