I am glad that you posted information about ducks. With sheep to eat the grass and ducks to get the bugs, you could spend more time gardening!
Tiffany would LOVE some pet ducks to chase. She likes to take a walk by the river (always on a lead) and make the ducks and geese fly! She isn't fast enough to catch them (and I wouldn't let her if she could). Do runner ducks fly? I guess not, otherwise they would be flier ducks. (Not to be confused with fryer chickens.)