I started to let my chickens free range as my garden is about done they really liked my wifes greens. Anyway when it rains they just stand there and get wet. I tried to get them back in the coope with no luck. For some reason they scatter for me when it rains but they dont when it is a clear sky. I can only surmise they are scared about the raining issues. Should I build a lean to outside the run?