My mature hens are not doing very well and now my rooster is doing strange things with his head. The Hens ALL have diarrhea with a chalky white substance sticking to back feathers, egg production is down I have 23 hens was getting 19 to 20 eggs a day but we are now getting 6 to 8 daily. We were gone 10 days and they did seem stressed got back late last night, checked the girls this morning and the seemed starved so we fed them they had food they wanted scratch and layer pellets. The roo is stretching his neck out and pulling it back over and over He won't let me near him So I need to go catch him and see if I can determine what's wrong.?