Low Ground
  As a breed, the Welsh Mountain Sheep is perfectly adapted to thrive in the 
  difficult conditions of upland Wales; however they are also well suited to live 
  on lowland areas. Those farming lowland areas can also benefit from the 
  excellent qualities of the breed by purchasing Welsh Mountain ewes to cross 
  with other breeds such as the Texel, Suffolk or Charollais to produce finished 
  lambs of high quality, meeting the high standards and requirements of a 
  demanding market, maintaining the reputation of Welsh Mountain Lamb for 
  producing delicious meat.
  A study carried out on an upland farm in Mid Wales showed that the Welsh 
  Mountain Sheep is able to produce strong lambs when crossed with the 
  Texel ram. On average, the survey lambs weighed 39.5 kg at 170 days old; 
  recorded a weight of 17.3 kg per carcass after slaughter and 84% rated ‘R’ or 
  better. The lambs were produced from grass only, reducing the need for 
  further feed-intensive feeding.
  Welsh Mountain Sheep are long-lived and still produce lambs at a mature 
  age. There is ample evidence, for example, of mountain sheep of five years 
  old and more producing two Charollais cross lambs in March with a live 
  weight of 40 kg in late June when the lambs are ready for sale.