Earlier tonight before setting my eggs in the brooder, i had a weird thing with one of the eggs. When i was candling it, i could see something shadowy inside the egg going along with me moving the egg. It wasn't very clear, but i didn't see anything like this with any of the other 29 eggs. I set it anyway because i wasn't sure if that was a bad thing or not. Any toughts on it? I don't have any experience candling.