Omar Espinoza works the night shift at Mayfield Dairy Farms. “I wake up, work out and then get ready for work,” the 21-year-old said. “I go in at 10 p.m. and come out at 7 a.m.” Espinoza was hired as a temporary worker about five months ago, after a year of working at a local chicken processing plant where he was responsible for operating the machine that cuts the meat apart.