Hello, We are raising four hens and two female ducks for about one year now (ducks came later, about two months ago) and since this morning one of the hens start behaving strange. When walking around her feathers are puffed but most of the day shes laying down in the nest giving 6 eggs today (does not let any one else use the nest). Last (and most unusual for her), she have no apitite. If additional info needed please ask, this is my first time here and I have no idea what to look for so any guidance would be appreciated. Should we get worried or this is normal?