The
Dorper breed was developed in South Africa. There are the Dorper (with black
heads) and the White Dorper breeds. The breed was established in 1942. Their fleece naturally sheds, so
they don't need any shearing. The fleece is also unusual, in that the hair only
grows in certain areas, as you can tell from the picture. They are also quite
resistant to disease and pests - they don't need chemical treatment for
flystrike. 
They are a very fertile breed, with the ewes being good mothers. Her lambs
grow very quickly.
Dorpers can survive on minimal amount of food and still thrive.
Credits: Photos courtesy of Marj & Ron Guenther, of Riverwood
Farm