I have an 8 hole nest box. Of course, they only use 2 boxes out of the 8. I keep a fake egg and a golf boll in each of the 2 nests that they use. About a week ago, one of the fake eggs disappeared. I looked all over the coop for it. I dug in the straw of the nest boxes. No fake egg. It was gone. Last night when I went to the coop to count heads, I saw an egg in the nest box that wasn't there earlier. I went back to get it. I swear they were all laughing at me. It was the missing fake egg. They removed the egg and hid it, and a week later managed to get it back in the nest box.