Today my son was about to eat an egg from our chickens that was hard boiled. When he started to peel it he found a gray lump, with a little yellow around it. I pulled it out, it was pretty firm but I squeezed it and brown gunk came out. I've never seen anything like it, pretty gross. it was far from the yolk. It couldn't be a meat spot could it? It was at the top, in the whites where the yellow is. Any ideas what it is? We don't have a rooster either.