Dairy herds are few and are mainly kept in CL3 and CL4 ecological zones. Two-thirds of the dairy herds in CL3 and CL4 are under a free- grazing system (Thorpe et al. 1993). The other one-third is kept under a zero-grazing system, which was introduced by the Dutch-supported National Dairy Development Program (NDDP) in the early 1980s to boost milk production. In this system, animals are confined to a shed, with separate feeding and sleeping areas. Farmers who practice the zero- grazing system have planted Napier grass (Pennisetum purpureum Schumach.), which they cut and carry to their cows. Some farmers have opted to practice a semi-zero-grazing system where animals graze in the field during the day and are stall-fed additional forages in the evenings. Farmers supplement their dairy animals with small quantities of maize bran alone or in a mixture with copra cake (from C. nucifera). Crop residues, mainly maize stover and grain legume haulms, are important livestock feeds.