Thanks! I was thinking about once I figure out how to do the pond, can you give ducks fish to catch and eat? I know wild ducks do, but would domestic ducks know what to do if they saw a fish? and if so what kind/age fish should I give them?
They *love* chasing fish in the pond. You can go to any pet store and get feeder fish (our store has two sizes: either small or large comets), and the ducks will go nuts for them, chasing them in the pond. (Our mallard can circle the pond several times underwater chasing them.) It usually takes them a few hours to catch them if we get a dozen or so.
Although there was one period where our drakes were so busy fighting each other in the pond that they ignored the feeder fish for a couple of months. By the time that they noticed them again, they had gotten too big to eat, and we now have four 4" fish in the pond year round. (It used to be 13, but last winter, 9 of them tried to winter over in the filter, which was not a good idea for them... They got caught in a freeze, and didn't make it through. But mostly the fish can winter over underneath the ice.)
The pond also attracts a ton of frogs, a bunch of which will also winter over.