Australian horses had been selectively bred for strength and stamina, reliability and versatility. The strongest were retained for breeding and despite their mixed origins they developed into a strong and handsome type. The horses that developed had a good temperament, were tough and reliable, able to work under saddle and in harness. They were used to clear timber, plough the land and herd sheep and cattle. From this base the breed was refined and developed, using the outstanding sires of the day. Thoroughbreds had a considerable influence, even though the breed carried bloodlines from other breeds.