Last September, we had a broody hatch out one chick and I can't for the life of me figure out who the mother is. I know I didn't put a buff orpington egg under the broody so that leaves the buff rooster as the dad. Potential moms - white plymouth rock, red sex link, barred rock, white pearl leghorn, australorp. I'm really thinking a white rock is the mom, but the black beak and legs, as well as a dark/dusky cast on the back and wing feathers on the offspring are really throwing me. Any thoughts?