I've been noticing that my silkies and showgirl hens are always walking around the pen looking for any feathers or straw and when they find it they pick it up and put it on top of their backs! Why are they doing this? They have a nesting and dusting area. Also I have 2 Roos in one of my pens that aren't breeding the hens. All of the eggs are infertile. Can anyone think of any tricks to get em working again? Thanks!