During the early years of the twentieth century the late Sir Jock Buchanan-Jardine began a breeding programme on his Castlemilk Estate in Dumfriesshire. Using Manx Loghtan, moorit Shetland and wild Mouflon, he developed a breed to beautify his parkland and provide fine, kemp free moorit coloured wool.

On the death of Sir John Buchanan-Jardine in 1970 the majority of the flock was culled and a few dispersed, including six ewes and a ram which were bought by Joe Henson at the Cotswold Farm Park. All today’s Castlemilk Moorits are descended from these few dispersed sheep.