1. Milk is “a natural” only for baby calves. Calves have fours stomachs and double their body weight in 47 days. Human babies have only one stomach and a much slower rate of growth. It takes human babies 180 days or so to double their weight, so they don’t need nearly as much protein as calves. Cows’ milk is 15% protein (it has 15% of its calories as protein); human breast milk is 5 % protein....