My experience turned out well. I hatched 9 out of 11 swan eggs, 3 Mute and 6 Black Australian. I kept a pair. Gunther is now 4 months old, Gracie, 2 months old. The 3 Mute and 2 Blacks went to the egg owners and I sold a pair of Blacks to a friend at 1 month old. All the cygnets are growing and doing well.