Last spring I got 15 ducks (in april 2014) and 3 embden geese (in july 2014) that I raised in a brooder and then released onto my 7 acre lake. This is a neighborhood lake and also has a variety of wild and domestic fowl on it, including a swan pair. We were hesitant about how our flock would get along with the swans since the swans often chase off the wild Canadian geese that come to visit. But we had no problems with the swans and our flock, they seemed to get along well. Over the winter we decided not to pen our flock up at night anymore. They worked with the swans to swim around and always keep a little area of water unfrozen and everyone made it through the winter just fine! Since the water has thawed we have noticed the swans getting more aggressive about our flock staying on our land but that was fine because they rarely left our land anyway. But now the swans have suddenly turned and seem to want them dead! They come up on our beach and chase, attack, and hiss at the flock. Even though i have pekin,ruoen,and runner ducks they can fly pretty well and have no trouble escaping the swans. The embden geese are very large and cannot fly well, though they usually would still get away or if they were caught by a swan, the swan would grab at their neck a bit them then let them go right away. Today I witnessed the swan separate one of our girls (gracie) from the boy (gilbert) and the other girl (gidget). the male swan had chased gracie into the lake while the female swan grabbed her neck and held her down then the male got on too and it looked as if they were drowning her. With all this commotion and me screaming, my mini schnauzer jumped her fence (which she never does) and came charging into the water which scared the swans off my goose, I was then able to call my dog back before she got to Gracie, though she didn't seem that interested in her anyway. I brought the geese up to the upper level of my yard where the swans can't get too (they're too big to walk up the stairs) and gave the geese food and water in buckets. So for now they are safe but i will have to take them back down at dusk to their pen (which is right on the lake) to eat and then they get let out in the morning where the swans are waiting. I can scare the swans back by using a paddle but they aren't satisfied until the geese are out of view and the beach is theirs, devoid of humans too (yeah they attack and chase us as well, they never did so in the past though). I know birds have a pecking order and that was what it was at first i believe. If gilbert got too close to the girl swan the boy would come over and bite at him then gilbert would leave. But now I'm really worried for my geese! They have started laying eggs and we wanted them to be able to nest but the swans came up and attacked them then destroyed their nest. I have checked everywhere around the property and the swans have not nested anywhere near us, in fact every year I've lived here they have nested in the same spot across the lake. I guess my question is: do you think the swans could/would really kill my geese? If so, what could I possibly do about it to establish our land as our flocks once again?