I don't know much about geese and am hoping someone can help me out. Sorry for the length. I got a pair of farm toulouse geese last winter, my gander got killed, so I answered an ad from a nice lady and got 2 geese from her, neither one of us could tell for sure if they were goose or gander, but she was almost sure at least one was a gander. I kept them locked up for a while and when I let them all together they hung together, so all was good. But when I put my runner ducks that I had hatched out in an outside pen during the day, my original goose wanted them, so I let them out with her & she adopted them, chasing the other 2 geese and everybody else away. After a while she let the other 2 geese with them but still kept the runners. So eggs started coming and i was getting eggs from all three geese, uhoh. So a couple of months ago I answered an ad on craigslist for a toulouse gander and brought him home, none of my geese will have anything to do with him (?). So he (?) chums with one of my bourbon red toms and the geese and their last years runner ducks hang. I don't know how to tell for sure if he is a male and if he is, will the other geese accept him when spring comes?