More on the essential nature of human breastmilk for human infants

[TylerDurden]

http://www.dailymail.co.uk/health/article-5019477/Mother-s-breast-milk-turns-YELLOW-help-sick-baby.html

The point being that human breastmilk changes its contents so as to adapt to a baby's needs. Also note that Hunter-Gatherer tribes routinely feed their babies for the first 2 years of their lives on human breastmilk. I will admit that the main reason was due to breastfeeding being the only really effective contraception at the time(=98% effective), but it led to much stronger, healthier babies as a result.