I had a pair of embdens, the goose was killed last summer and the gander seemed to warm up to a chinese goose that I had. In the mean time I found a guy with a pair of emdens he wanted rid of. I bought the goose and traded my Chinese to someone else. So now I have a pair of Canadians, which is obviously a pair, and the two embdens (and assorted ducks). It's been a month and my gander has never accepted the goose into the flock. She mostly eats off by herself and is never very close to the other birds. I've noticed a change in the gander's behavior lately, he's become more vocal and defensive and hisses much more often. My question is as mating season progresses will nature take its course and will he breed with her since there are no alternatives, or is she likely to go unfertilized?