I have no roosters and 5 hens. One of my hens (blue copper maran) lays delicious eggs, but on occasion she will lay an egg that has a "seedy" looking mass in the center of the yolk. I eat boiled eggs almost every day and I get one of these eggs once every other week. The smell is awful and I want to try and find out what this is.... I have tried to research it on the web, but havent had any luck. Hoping someone here knows what it is.... Thanks for any replies!