Hi there, I bought some eggs from a local farm and when I when I went to cook one I noticed the blastoderm on the surface. I read that this means the egg is fertile. This is a photo of the egg - black and white seemed to show the blastoderm better. I thought, being from a local farm - it's likely the hens and roosters are kept together so decided to incubate the other 5 eggs. I have been incubating the eggs for 4 days now and when candling them they are the same is when I started - looking like just a yolk floating around inside, no blood vessels are even slightly visible. Thinking that the first egg must have been a fluke, I broke one of the other eggs open to be sure there was no development before I disposed of them. These photos are of the egg that I cracked open after 4 days. Was this egg fertile or not? I read that there should be distinct blood vessels and a dark spot in the middle as well as a visible air sac. Can anyone give me any advise as to what is going on? Im very confused..