Three weeks ago I got four chicks at the hardware store, and they were supposedly sexed, and approximately 4-6 weeks old. Now that the chicks are about 7-9 weeks, I think I have two roos, two hens. The two that I think are roos have longer combs, that are distinctly red, and the one is very aggressive - ie. kicking at the other chick I think is the other roo. . . What to do!?