One of my girls seems to have an unusual problem. when the sun starts to go down and the others go to roost, Tufty freaks out big time. she runs around looking for them and wont go into the coop, she will sit on top of it and wait for me. Its getting me really worried, when it rains she gets soaked, when it snows she gets snowed on so i have to go and put her in. Whats wrong? is she scared of the dark? or is it something else?