I have eggs that are gonna be going into the bator later this evening. I figured I would candle them before I put them in. 2 of the eggs have spots in them that when you move the egg, the spot moves within the egg. I haven't seen this before. I have tried to do a search for it and I couldn't find anything. Can someone tell me what it is? I don't have pics, sorry. This spot clearly moves in there when you move the egg.