Hi there, I'm on day 17 of incubating my chicken eggs, and I've noticed several of the eggs have this glossy sport on the outside? I've tried looking it up but haven't gotten clear answers, however I'm afraid what I did find may suggest this is bad. These are eggs laid by our own flock, but the first time we've ever tried incubating. They're in a large self-turning incubator, but I'm worried they didn't turn enough. Or maybe it's just the air cell positioned normally the couple days before pipping? Help!