Most parents who adhear to Mr Ezzo's phylosophy have insufficient milk supply. Infants need to be fed when they are hungry, they are not trying to manipulate their parents.Breastmilk itself is digested in about 90 min.That is why they need to eat more frequently than that author thinks they should.He has caused many new mother's to feel inadiquate, because they don't think they can supply enough milk for thier baby, not realizing that it is not them, but this man's method of parenting.