We have had a pair of mute swans at our dock for years - in the course of 20 years, three different pairs. This spring a new pair came and have managed to dislodge our swan pair from their "territory" - our dock. We feed them cracked corn year round and have for years. Now our old swan pair have moved about 200 yards across the creek and have had five babies. In the last two weeks, the "new' pair father has attacked the old father and we have gone out in the boat and broken it up just before he was drowned. I fear they have broken bones in his wings - will they eventually kill him? And what will happen to the mother and five babies?