what do you feed your ducks? everything i keep reading says natural foods they find themselves. well i live in the city and can't let them forage, yet. i am expanding my chicken run to add a pekin in with the chickens. can i buy duck food at TSC? any other information on pekins would be wonderful. i'm reading up on them before i purchase. i want to know as much about them as possible so there are no surprises later and have to end up getting rid of them.