This is a rustic sheep, of a medium-large size, with a proportionate head. It has a white coat and generally well-developed horns. Its milk is rich in nutrients: its protein content in particular is superior to that of any other sheep breed. For Zerasca sheep specifically, the milk is used only in raising the lambs, since this breed is well primed to produce lambs for meat.
Zeri lamb is bred in the semi-wild state, integrated with local hay. Lambs must be fed the mother's milk and taken to pasture with their mother until slaughter.