I started with 16, down to 13 over the course of a month-give a week or two. My issue now is that the chicks are losing thier feathers-going bald!! The feathers they do have are ratty and nasty looking. I keep thier brooder clean and dry. They've got plenty water and food. What could be going on?? Looks like one-my baldest one-may pass tonight. Poops look ok. They do not pick on each other. Help!