Well, I am new to having chickens and have two questions. First, my chickens make purring sounds like a cat. Can anyone tell me what that means. Second, every night when my chickens go to bed, they struggle to find a spot to roost. They step, walk, and lay on each other, they fall off and jump back on and disrupt the rest of the chickens, it looks and sounds like it hurts. Is this normal and is there some way to stop this?