Yesterday was day 4 and I candled the seven eggs that I have in the incubator. In one egg, there were veins and an embryo but there was nothing in the rest. Are all but one infertile? Is it normal not to see anything in the eggs at this stage? I candled with the torch from a smartphone. This is my second time incubating, and I got nothing no hatches out of the first time. I always said that even if I only get one chick, I'l be happy, but I thought that they would all be fertile since I have a rooster.