Suckle

[Gregory]

To [wrap] ones lips around an object / body [organ] and lightly [breathe] in.

[Zipporah Schumaker]

Feed (a baby or young animal) from the breast or teat.

[Merna]

to feed a baby, especially a baby animal, with milk from the organ in the mother that produces milk, or (of a baby, especially a baby animal) to drink milk from the mother: