Hi, my 5 hens that are 4 months old did not want to come down from their roost today. It's 11am! Coop door opens at 8am. Very odd for them. Any Ideas? I looked for any sign of a predator invasion. Nothing. They all appear healthy and happy. We are supposed to have severe weather later today, could they sense that? It's sunny blue skies at the moment. The clouds are building out west. So bizarre. Do they do this? It's my first feathered family.