Turkey Jerkers?

This morning while working out we got to talking about summer jobs. One of the guys at the workout, Tommy, described his summer job working at a turkey farm. His job was counting the male turkeys as they would go through the line in order to be serviced (these guys were called "turkey jerkers" to manually retrieve their semen. If the job wasn't funny enough, he told us a story about how they were running into problems with having sample rates of 105% until they figured out that after being "serviced" once, the turkeys would get back in line for a second time for more.