I have been feeding them chick starter/grower. I asked for non-medicated and this is what they gave me. One duckling is haveing episodes where he is wobbly and flipped over once. Then he acts normal. I have done a search and saw that it is a vitamin defincey. The only thing I have here is flight devolper for my gamebirds, and turkey starter. The feed stores are closed and I don't have brewers yeast or vitamins. Should I just go get some, or is one of the feeds I listed ok to feed them? I did not have a problem with the first set of runners feeding them the same feed, but now I have had one die and one acting weird! Please help!!