I noticed one of my shipped eggs had a black spot in it very close to the actual shell. It looks like a blood spot maybe? I set it anyway and we are at day 4---seems to be growing veins. All of my shipped eggs had crazy scrambled air cells so I followed instructions on alleviating that. I also popped 4 eggs in from my hens JUST in case something happened (or doesn't lol) Nothing I can do about it, but anyone know what it is?