How should I introduce cow's milk into my child's diet?
Suzanne Berman, M.D.
At or about one year of age, we recommend switching from formula to whole milk. When toddlers discover that cow's milk tastes a lot different from formula, many will initially refuse the cow's milk. Here are some things to try: My child doesn't like his/her formula. Can I switch him/her to cow's milk before a year old?
We don't generally recommend this because babies who get cow's milk before age 1 can have: Children usually refuse a new formula if they are switched from one to another for cost reasons. You can use some of the transition tips listed above to make formula switching easier. Best of all: stay on the same formula until 12 months.

Do I need to introduce cow's milk at 12 months to my breastfed baby?
As long as your baby is breastfed, he or she does not need cow's milk and will get all the calcium he or she needs from breast milk.