Personally, for my family, we have trouble digesting milk. Yogurt has enzymes that make it easier to handle especially on small stomaches. I can not say yogurt is better than milk, from that aspect, but children do have to consume more calcium and protein. I can tell ya, toddlers don't chew calcium supplements! And toddlers really don't consume green anything very well. Too much broccoli and man, you have some pretty nasty diahrrea to content with. So we use what works at this point. I guess it is up to you and your personal beliefs on what you use for your family. Organic yogurt is probably better than milk. No hormones from pumped up cows. Just as women do not lactate unless they have a baby, cows don't either, so they give them hormones to induce milk production. In our case, this is the best we can do to keep the little one from being deficient.