I don't know what's going on with my flock!! I lost a chicken Tuesday night/Wednesday morning and I thought maybe she got to wet during the storm and maybe got cold and died but then I went out this morning to let them out and I have another one sitting in the nesting box with her face in the corner and she's breathing heavy and won't move. What could be wrong?! And what can I do to make sure my last 3 don't die??