I cant speak for anyone else, but I much more enjoy the snakes and frogs around my pond, then the cheap fish it is stocked with. For those with long loved and expensive Koi, the pain of losing them to opportunistic wildlife must be frustrating.That is what I do, I put cracked corn with a chick starter mixed in. They still nibble here and there but nothing major. All the lilies are doing fine. Besides I will gladly replace a plant to keep the ducks around. I know they seem like evil being in a pond on forums like this but personally they have been awesome to have around. They have been coming here every year since I installed the pond. This is the first year with the ducklings and it is a wonderful treat at least to us.