Several times now since I've had my chickens (about 6 mos), I have gone to open up the coop in the morning and there has been an egg under the roosts that was layed during the night. It's not always the same hen either, this time it was my auricana. I went out there a few min ago (6:45 am), and the egg was warm. So it was just layed. and they're not always warm either so it happens at all times.This wouldn't be a problem for me except for the fact that the egg is usually cracked because it's dropped from the roost. Why are my chickens doing this?