I have two mutes swans on my 1-acre pond (Wisconsin). They laid 9 eggs this year... 5 turned into Cygnets.... and now only one is left. He is pretty much full-grown and it starting to turn white. My question is - what will happen next spring with him/her and the two adult parents? Will they have issues with each other?

The parents already think they own pretty much our 20 acres, so keeping them separated probably won't work if I have to. Thanks.