The name of the goat who fed Zeus after he was born is letter D or Amaltheia. She was the she-goat who nourished Zeus with milk in a cave called Dicte located in Crete. Her name was always mentioned to be the foster-mother of Zeus. In fact, you can see the work by Jacob Jordaens in early 1630s entitled the Infancy of Zeus in the Louvre Museum.
His work depicted how Amaltheia helped provide milk for Zeus when he was still a kid. When she died, Zeus used her hide to make the aegis, his thunder shield, and her crown to make the cornucopia or the horn of plenty. Also, she was placed among the stars as the constellation Capra. It is a group of stars which surrounds the Capella on the arm of Auriga the Charioteer.