While there are some sources recommending fresh milk for toddlers after 12 months, but I will still recommend formula till 24 mths or till my child rejects formula. The nutrients in formulated milk are higher and i felt more assured. S-26 is known for the nutrients for brain and eye development, and also 2'-FL... which no fresh milk can provide. Sometime, Fresh milk are nutrigrade C and D.... If the child is fussy, and only 12 mths, I rather play safe and feed her formula to make sure every drop counts