My son has been drinking Nido Jr. since he turned two last April. So far, so good. He's not HUGE nor constipated, whatsoever. He was formerly using NAN.
It's really important to check the label. We may not notice it but we could be exceeding the recommended servings of milk they should take in a day. In my son's case, the pedia said we should give him milk 2-3 times a day, the rest of his meals should already be solid food. I see to it that the number of scoops is tantamount to the volume of water, everytime I prepare his milk.