i have swedish ducks (if that has any baring on the question) and i just invested in some self feeders from tsc............ well my real question is can you over feed a duck and found it like you can a goat or something because they have access to food 24/7 and you can tell sometimes they take advantage is that a bad thing? i've seen them just lay down and eat my chickens on the other had dont gorge themselves like the ducks do..........can you overfeed them and cause problems?