The fodder resources available to livestock vary with the climate, the farming system and the season. The important fodder resources are forest grazing; natural grassland; improved pasture; shifting cultivation and fallow land; fodder trees; crop residues and others (like arable fodder crops grown in croplands). Estimates by RGOB (1995) and Roder (1990) indicate that forest grazing and natural grassland grazing contribute about 23 percent and 30 percent respectively to the total fodder requirement. These two fodder sources have also been highlighted as the most important sources of fodder in an assessment of fodder resources in five livestock rearing Dzongkhags (Roder et al., 2001). The survey also showed that grazing fields after harvest was the most important source of winter fodder.