My girls used to roost all together! Now about a month ago, one of my hens starts to sleep on the ground by herself. I keep an eye on her to make sure she is not sick. She seems to be well!! I decided to let her do her own business, but the problem that I encountered lately was the freezing poop. Since she is not roosting and the temperature here is below freezing, she ends up have a bunch of freezing poop on her butt. I had to wash her with warm water and the problem solved. I do not want to have to wash her poop all the time. What should I do to make her roost with others again?