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Our female, Juliet, had no cob last year. Took her 2 eggs from another pen and Both hatched. Juliet now has 2 unfertilized eggs and the two year old cygnets with her. In 18 years I’ve never seen cygnets behaving like they are. They are very aggressive and big, no doubt males. At their age they are sitting on the nest when Juliet isn’t. These cygnets aren’t mature enough to mate but one did mount Juliet for 20 minutes. As their daily feeder they are after me to kill me. What’s going on? Should I catch, clip them and relocate them to another lake? We have 9 lakes in our gated community. The other two eggs left with the pen last year are very sweet and are clutchmates of the aggressive ones?