Being the most extensively distributed of the poultries, the domestic chicken (Gallus gallus domesticus) provides humans with a stable sources of protein, including both meat and eggs (FAO, 2007). The chicken has a long history of anthropomorphic usage in Southeast and East Asia, where it has been bred for entertainment (cockfight) and ornamentation (Macdonald and Blench, 2000). The domestic chicken also serves as an important model animal in biomedical research (Wu and Kaiser, 2011). Although humans derive much benefit from this poultry, its history of domestication remains open to debate.