Alot of the eggs we have been cracking open lately have had very definite bull's eyes. I did some research and bull's eyes mean their fertile, right? But we don't have a rooster! We have 11 hens and we know for a FACT that they are hens because some days we get 11 eggs. The nearest rooster is a mile down the road and their is NO WAY he has been over here. We also have a guineas, ducks, and peachicks, but I've never seen cross-species-mating (if there even is such a thing). So I'm wondering WHAT IN THE WORLD IS UP? The only thing I can think of is that we're worming them right now, does that make any difference? I tried to take some pictures of the bulls eyes, but they weren't clear (sorry). Any ideas? Thanks!