The livestock production sub-sector is the second employer next to agriculture in Tanzania. Of 4.9 million agricultural households, about 36% keep livestock (35% are engaged in both crop and livestock production; only 1% are purely livestock keepers). The livestock sector contributed 5.9% to total GDP in 2006, of which dairy production contributed about 30%, after beef production (40%). Other stock provided 30%. Livestock not only contributes to the national GDP but also provides food (meat, milk and eggs) to communities. The sector therefore acts as a living bank as it acts as a source of income for the livestock keepers. Furthermore, the sector contributes manure and draft power (Njombe and Msanga, 2009).