sentence: Mammals never feed themselves at first.
sentences_after: Mother's milk is part of the 'contract' a mammal inherits. But there is a big difference between some new-born deer and antelopes, which can run within an hour or so of birth, and a baby marsupial which is in the pouch for days or weeks.
concept_name: mammal
headings: Precocial Mammals
categories: Developmental biology Birds Mammals