Marco Antonio Jacho López

INTRODUCTIONBrazil is the fourth largest producer and exporter of pork worldwide, rearing pigs under intensive feedlot conditions, to optimize production and economic performances (BAPTISTA et al., 2011). Constant and growing consumer concerns about animal welfare and rearing conditions have boosted the search for sustainable social-friendly production systems (SARUBBI et al., 2010).In conventiona ...