i currently have a flock of white rock chickens hatched end of october i have never had chickens that craped so much in a large barn the hole floor is covered in crap and featheres i rake it and mix it daily it does no good it only takes a week for them to make it dirty i have had red sex links and leghorns in their and they have never been so dirty i thought at first it was feed so i switched them chick started to layer/scratch grain mix after this batch of feed is gone im switching to feed mills feed were they mix it themselves with loccaly grown feed and see if that helps any other ideas on what causes this?