First of all, keep in mind that cow's milk is made for cows, and that your baby, once weaned from breastmilk or formula, does not have to start replacing that milk with cow's milk.
If you do, though, remember that until they are over 1 (actually older than that, but 1 is a standard) their bodies have a lot of problems breaking down the proteins in cow's milk. period. ORGANIC WHOLE milk is the ONLY kind of milk they should be given for that reason, (and the fats in it).
My twins are 16 months old, and one still nurses 2 times a day, the other about 2 times a week, but the only cow's milk they get is whatever might go into a food, (like mashed potatoes, homeade split-pea soup, etc). They drink water, water water, and occasioally a little juice or tea, mixed with water, from sippy cups.
And they eat "REAL" food (not processed foods)and are able to get ALL the nutrition that they need from that. They have been eating real food for their nutrition all along, and before they could chew it all up, we blended it up. Calcium, iron, etc can all be found in fruits and veggies.
I know my post may not be a popular one, but I am not trying to offend anyone.
THanks all!