If she is eating a range of foods then there is no need for her to be on formula after 1 - cow's milk is fine! You may find that she doesn't like it at first so you may need to transition by swapping oz gradually and some babies can get a bit constipated once they start having more cow's milk but that usually sorts itself out in a few days.
From 1 they only need 14-16oz of dairy to get their needs met and that includes foods, so milk is a drink now, not a food!
HTH!
Laura