These are my geese, I was told the big one when I bought them was the boy and the rest were girls. We don't think so. We think we have either 5 boys and one girl (one has no knob, and a completely different feather pattern on its neck, and its a BIG goose, but shorter and stockier than the others, with NO knob on its head, so we think a different breed was thrown in with the Chinese . ..) . Any help would sure be appreciated. They are mating in the water, but the one we suspected as the female is the one doing the breeding . . .we are really confused!!!