system for sheep
stratified system based on the different carachteristics of the breeds and the geography of the country
hill sheep
welsh mountain, swaladele, scottish blackface, cheviots, rough fell, dalesbred, derbyshire, herdwick, hebredean
upland
blue faced leicester, border leicester, teeswater, wensleydale, devon, cornwall longwood.
lowland
texel, suffolk, charolais, clun forest, romney, oxford, hampshire dorset down, lleyn
nutrition
ruminants, fermentations of food grass and forage for energy good quality protein (less efficient than cow) need vitamin A, d& e minerals (mineral block)