My approximately 7 month old pullets are beginning to lay. I've gotten a couple of really small eggs but I can't tell if they are from the BO pullet or the cochins. is there a way to tell? also, this morning I went out and Olivia, one of the EE pullets was standing over a blue egg in a nest box but it was a normal size egg. Is it possible she is starting out laying big eggs or is it more likely that one of my adult hens laid the egg and she was just investigating?