I used to have two full-sized roosters and one banty. Now I only have one big roo. When I had the two big guys, it was like a competition with them servicing the girls. My hens eggs were always fertile. Now that there is no competition I don't see the remaining roo after the hens quite as much? I've cracked some eggs and they look fertile, but some I'm unsure about? I just gave 8 eggs to a friend to put under her broody and I'm hoping and praying they are fertile! I've got about 12 hens and 2 roos, seven of the hens are not of laying age yet. The chickens all free range most of the time. What are the odds of my eggs being fertile or infertile?