Pecorino sardo, also known as fiore sardo, is a firm cheese from the Italian island of Sardinia which is made from sheep milk: specifically from the milk of the local Sardinian breed. It was awarded Denominazione d'Origine status in 1991 and granted Protected designation of origin (PDO) protection in 1996, the year in which this European Union certification scheme was introduced. Its flavour is different from that of the Pecorino Romano, which is also made on the island. Sardo is richer while romano is much more biting and salty. Pecorino sardo is an uncooked hard cheese made from fresh whole sheep's milk curdled using lamb or kid rennet.