The pig production system prevalent in the country can be broadly divided into subsistence (traditional) production in scavenging management and recently emerging commercial piggeries. Under the traditional subsistence production system, mostly indigenous pigs are found to be reared under scavenging management near the villages. Hurrah, Chwanche and Bampudke are the native pig breeds (Neopane and Kadel, 2008). Certain ethnic communities are found to be involved in the production of pigs under this system. Both input and output under this system are low, but have significant contribution in the household level food and nutrition security as well as for the fulfillment of the religious requirement. In some communities, pigs are even used as gift particularly during the marriage ceremony. Pig's meat (pork) used to be consumed by certain communities in the country in the past. The recently emerging and fast growing is the commercial pig production system, under which mostly exotic breeds and their various crosses are reared in the confinement with commercial feed supplementation. Yorkshire, Landrace, Duroc and Hampshire are the common exotic breeds introduced for commercial production. The tribes and religion are not important in this production system, even the Brahmins youths are found to be involved in commercial piggery. Under this system, farmers are found to be keeping from few breeding sows to as large as 200 breeding sows with more than 1000 fatteners with the concept of factory farm production. Beside these systems, pig production has also been found to be integrated with fish farming in the country (Shrestha et al., 2014). On the negative side, pigs are generally blamed for environmental pollution, particularly those reared under scavenging management system. These animals contaminate water sources and waste dropped here and there in the village is a real problem for the community. Likewise, it can disturb social harmony due to noise and off odor created by pig farming in the human settlement. The most important point is these animals can help in spreading of various zoonotic diseases. However, if properly managed the risk of disease spreading and dispute due to noise and off odor can be minimized (Shrestha et al., 2014).