I candled eggs today and two of them appeared behind the others. The one looked like this: https://www.backyardchickens.com/image/id/5624984 but with a slightly larger yolk.Would the egg be infertile? The other one looked more full but slightly behind the others, and I couldn't see a heart and or veins. Today is the 4th day in the bator. Other than that, my eggs are looking good!