I have three girls, 19 weeks. One is very red, comb has gotten bigger than the other girls (I know she is a pullet, not roo). She does the squat and today my daughter saw the rooster "get on top of her". So shouldn't she be laying? Or does this mean she is about to? She has NO interest in the nesting box and is kind of a loner. Should I keep waiting or start checking the bushes?