 [ Symptoms ] my 11 month old drinks soy formula can i switch her to whole milk [ Disease ] most infants transition to whole milk at 12 months assuming they are eating well from the table and do not have any sensitivity to milk and milk products milk is just one source of nutrients in a child is diet but cow is milk and soy formula are not bio equivalent i do not know why your child is on soy so i really can not give you the okay to start whole milk you will need to talk to her pediatrician