Glad she took it back. You will need to move her entire nest though, in a day or two she'll want to take the chicks out to roam around and they have to be able to get in and out of the nest.
You need to go buy "chick starter" food. I prefer non-medicated, some do use medicate though, just read the bags. A clean source of water than the chick CANNOT drown in as well.
Your local feed shop should have these lil plastic feeders. They call them "mason jar feeders" but they are all plastic. Look like a white plastic jar that screws into a brightly colored bottom, one with holes and you use it for feed, another will have a moat around the bottom and that is for water.