I have a flock of Black Australorps (26 hens and 3 roosters) that are 9 months old. For the past week to ten days they have suddenly begun acting very strange. I have a six box laying house where my hens lay their eggs but lately EVERY SINGLE CHICKEN has been spending all day in the house!! I will walk by their outdoor coop and not a chicken/rooster in sight! Does anyone have any idea why my chickens are doing this? They haven't been eating their pellets either for the past few days, tho they do eat some of the scratch and drink most of their water.... Help!!!!