characteristics when fed a high-energy diet for 165–183 days. In this heat stress trial, they outperformed the other trialled breeds by producing the highest average daily weight gains over this period. Their superior performance in this trial was attributed to their lighter-coloured coats. Carcase quality In 1967, three carcases were sent to the United Kingdom to participate in the Commonwealth carcase competition at the Smithfield Show, where they took first, second and third place. In Australia, Murray Greys have dominated hoof and carcase competitions for many years. The Murray Grey breed was the largest represented breed at the 2008 Calgary Stampede Carcase Competition. A Murray Grey steer was declared the Grand Champion Carcase there for the second consecutive year. In 2008 or the first time in the history of the Midland Bull Test and sale in Columbus, Montana, a Murray Grey bull scored a perfect 10 on the genetic test for marbling and a near perfect 9 on the genetic test for tenderness. No bull of any breed has ever performed so well before. Behaviour The breed is known for being easy to handle, having a "docile and easy temperament". Distribution Murray Grey cattle, embryos, and semen have been exported to Canada, New Zealand, South America, the United Kingdom, and the United States. Murray Grey cattle have also been accepted into the South African Registrar of Livestock Improvement’s books. In Paraguay, Murray Grey cattle have been used in crossbreeding programs involving Zebu and Charolais cattle. The Zebu and Charolais cattle there lacked the dark skins and early-maturing traits of the Murray Greys. This crossbreeding program improved the fertility, calving ease, and weight gains of the progeny produced there. See also Greyman Square Meater Tasmanian Grey References Beef cattle breeds Cattle breeds originating in Australia Cattle breeds