I have 20 hens - 1 1/2 years old, white leghorns and easter eggers (and a rooster). The hens were great egg layers until about 6 weeks ago when egg production tapered and finally stopped. I have a light on in the coop for 14 hours daily just like last year. They are not having watery poops, have perhaps lost some feathers but ?I don't know how many feathers are lost when they molt. Today I went in to feed them and they were all sitting on the floor, having 'dug' little nests in the wood chips on the floor . Most got up and came over to see me but some just stayed in their trenches. Is this normal behavior??? They didn't do it last year and I have never had chickens before. Help!