i have heard runner ducks are good they are about 50cm high and a bit different than other ducks( have a look on google images) but they are friendly duck and don't realey need a pond but they will love it.they also don't eat as much as normal ducks. but with all ducks the females are louder. if you want eggs they lay 200/300 eggs per yr put from a good laying strain yuo could expect 365 pr year