I have a bunch of banties. Mixed up ones. A couple EE's, a Mille fluer d'uccle roo, a brahma hen, etc. And I have a second generation. So my first generation is from three different hens, and two roosters. Now I have one of the original roosters, and one second generation rooster, whose sire is the other original rooster. And I have 6 new hens. When should I introduce some new genetic material, or is it okay to just let the roos I have continue to breed with my hens, even though they're closely related? I was thinking of getting a few hatching eggs and sticking them under one of my broody hens this spring. Should I even worry about that?