If the eggs shown were laid the same day, then no, a and c are not fertile. See that ring around the germinal disc on egg B? I believe it signifies cell development. All eggs have a germinal disc but not all eggs have been fertilized.
After clicking on the pictures to enlarge, I was looking at egg c and trying to get different angles on it. It MIGHT be fertile. I think I can see the beginnings of a ring around the disc.
One way you can check and be sure is to start the incubation process. After 3 or 4 days, you can candle them and if they're fertile, you will see the spidery veins spreading out from the disc. That way, you don't risk killing it by cracking the egg, if you don't want to.
After clicking on the pictures to enlarge, I was looking at egg c and trying to get different angles on it. It MIGHT be fertile. I think I can see the beginnings of a ring around the disc.
One way you can check and be sure is to start the incubation process. After 3 or 4 days, you can candle them and if they're fertile, you will see the spidery veins spreading out from the disc. That way, you don't risk killing it by cracking the egg, if you don't want to.
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