Can I Switch My Child From Formula To Nido Or Nespray, As She Refuses Formula Milk?

My 11 moths baby is still on breastfeeding and formula but im also workin. So I noticed that she doesn t want formula milk now she only want rooibos and juice. Can I try her on Nido or Nespray cz she need to have milk on her system? She also drinks longlife but the problem is on her formula.