 Towards the end of the 20th century, there were more than 11 million sheep in Wales.The most popular breed of sheep is the Welsh Mountain sheep which is notably smaller than other breeds but better-suited to the Welsh landscape and only rears one lamb, rather than the lowland breeds which rear two or more; the mountain sheep are regarded as having more flavoursome meat.Welsh farmers have started using scientific methods, such as artificial insemination or using ultrasound to scan a sheep's depth of fat, to improve the quality of their meat.