Last night I was amazed when all three of my girls were on top of the coop when normally they go inside the coop at night. Today just one of my girls was on top of the coop while the others were inside. When i saw her i pet her and told her it's okay. She was making a high pitched almost purr not sure if any of you are familiar with that sound? Didn't know if she was in pain or something? Is this normal behavior for hens to do? The hen in particular rarely roosts on the tall roosts i made for them in the run so it's odd that she is roosting on top of the coop at night. Any feedback would be great thanks!