I have 4 of the muskovys in my pond and I cant get them to leave(The wife got em without my knowledge) and there are 2 fairly good size lakes behind our property.My fed them for a couple of weeks and they do go down to the other lakes/pohnds, but they come back every day! If you plan on feeding any fish, be prepared to fend off the ducks..They love the fish food a little too much!! I have to guard my feeding ring till the food is all gone or the ducks will eat every last bit and peck at the fish to make em leave!