Yesterday, I found a hen dead, about 3 years old. dead in nesting box, but few days ago in corner . Today found another Gwen limping and in corner but did come out to drink. Only thing new , is I bought new straw from central tractor, it was compressed and in plastic . I usually by fresh and not chopped or compressed, but usual place was out. What could it be? I am afraid I will lose my hens