Is there a trick anyone knows for telling if eggs are fertile without cracking them? I'm in the mood to try hatching, and I can get large amounts of cheap eggs from a friend, but she only has 3 roosters with 120 hens, so she doesn't think there will be many fertile ones. I've cracked a few for breakfast and a lot of them look fertile to me. It just seems such a waste to not know if an egg is fertile until you either crack it for eating or leave it in the incubator long enough that it is no longer good for eating. It would be nice if there was a way to tell before incubating, but I've never heard of one.