Welcome to BYC. Glad you decided to join our flock. With due respect to the others, I don't think she's a White Leghorn (at least not pure WL) with those gray legs as Leghorns have yellow legs. I'm thinking maybe a White Minorca instead. If you haven't done so already, definitely check out our Learning Center at https://www.backyardchickens.com/atype/1/Learning_Center. There is loads of useful information there. Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck with your hen.