Can anyone tell me why my hens have started to cannabalize their own eggs? They just started doing this yesterday, and did it again today. They aren't doing it to all of the eggs, just usually one per day. It's frustrating, but they obviously love the flavor of it, because they crack a hole in the egg and lick out all of the inside. So strange! I'm wondering if maybe they're lacking something that I should be giving them? They receive a mix of Layena pellets with oyster shell & grit each day, in addition to fresh kangen water mixed with raw apple cider vinegar with the mother still in it, and greens like alfalfa, clover, and grass. They are very well loved and cared for, so this is pretty shocking to me. They are Buff Orpingtons & Black Sexlinks. Thank you for any help.