Just some ideas that occurred to me over dinner:
"The milk of human kindness" Shakespeare
We bestfeed/I'm a bestfed baby
We blestfeed/I'm a blestfed baby
Not stressed-fed, breast-fed.
For the Bible belt: Isaiah 49:15
("Can a mother forget the baby at her breast and have no compassion on the child she has borne? Though she may forget, I will not forget you!")
For a mother/baby pair where the mother is a doctor, the baby's shirt could read: "She doctor, I nurse" and the mother's could read "I doctor, s/he nurse."

Not a latch-key kid, a latch-me kid. (Hmm)