I'm going to be gone Monday night, with my other animals its not an issue (except the chickens will be peeved that they won't free-range on Monday). Currently I let the ducks (4 indian runners - about 2mos old?) range in the yard all day, give them a huge scoop of food at night when I shut them in. They eat the food fast. Can I give them extra feed (maybe 2 containers) on Monday morning and will they be ok? I should be home Tuesday afternoon. TIA.