I have 9 ducks, a muscovy (which I believe is part of the goose family) and 3 geese (3 females and 1 male). Two of the females are recent additions and about one and a half years old. The gander and other female have been with us for about two years now. The female I think is pregnant and the gander is soooo protective over her. He leaves the ducks alone but the poor muscovy cops the brunt of his aggression. He has bitten holes in his head and I am afraid that he is going to kill the muscovy one of these days. I have seen him pin him under the water in the dam for what seems like ages to me. The other two females he just chases and they get away from him. He has never been aggressive to me or my husband. He seems to be more aggressive at the moment and I suppose it is because the female is pregnant. Dont know what to do about him. They are not pets as such as they live in and around our dam. I feed them in separate bowls but generally they share. Any suggestions?