I have two call ducks, one of them thought to be a male (though they're still a bit too young to tell). I've placed an order at Metzer's for two Golden 300 Hybrids, one Welsh Harlequin, a Cayuga, and a Fawn and White Runner, all girls. If one or both calls end up being male, would they be big enough to mate with the others? They're not exactly show quality, but they definitely aren't huge, either.