I use hay or pine shaving's in mine.I generaly use hay for standard breed's.I don't use straw I find it too stiff personaly especialy for bantam's like silkie's, frizzle's etc.If you free rage you will find egg's in Kooky places lol.In a lawn sweeper,On a lawn mower seat,An unused flower pot, behind a board with leave's, in an old bucket...They pick a spot and that is what they like lol.But if penned just about anything covered with a lil cushion will fancy them.