I just bought two ducks today and its my first time owning them. I read something about ducks eating goldfish and was wondering if when they get older will they pick my goldfish out of my little zen pond in the front yard?? Its a little 25 gallon pond surrounded by bricks and flowers but i have some goldfish and crawfish in my pond and im worried they might go in there and eat them even tho they have their own pond to play in