This is my second try with duck eggs and some of my eggs are pipping. I've noticed 2 of my eggs have holes in the bottom of them. In other words, tiny pieces of the shells have fallen off the bottom of the eggs. I don't know if I leave them alone or turn them. One is moving quite a bit the other I haven't seen move. I can't find any answers about this being normal. We are on day 27. Any help on what to do would be appreciated.