Sadly, I think one swan killed the other. Her neck was broken. During this time of year, they are very aggressive with one another. I believe it's bc its mating season ?Even though both female, still hormonal & territorial. However, only for few months around this time of year. I would love to get another one, just worried the older one would be Too agressive. It's really difficult to find information concerning swans, so I really appreciate your help.