Hello. I have 4 chickens, 9 months old. They are vivacious and noisy and appear for all the world to be healthy. One hen clearly stood out as the mother hen from an early age and she remains so. Oddly though, she seems to have stopped roosting at night. She used to roost. All the others roost. In the last few weeks she seems to prefer sleeping below the roost. Occasionally she does get up there but most often is found below. I haven't really been worried but she's taken to sitting in the "line of fire" under the other chickens at night. I have surmised that as she is herding the other three to bed and watching their backs against assassins, she might be waiting too long thereby getting caught out when it is too dark for her to see well enough to get up on the roost. I've been turning on an outdoor light but that doesn't seem to help. Any ideas? Thank you for your help.