I have a 9 hens and one roo. I get 7-8 eggs a day normally, however............almost daily there is one, a green one, with a hole pecked in one end????? What on earth? sometimes its every other day or so but very consistent. always a green one and always just a hole about the size of a dime or the eraser end of a pencil in one end. Any ideas? Could one hen be sabotaging another hens egg?