THREE farmers who had sex with horses, goats, dogs, and a cow need to continue serving their decades-long prison sentences behind bars, a Pennsylvania court decided on Thursday. Matthew Brubaker, 32, Marc Measnikoff, 36, and Terry Wallace, 42, made videos of themselves while engaging in bestiality and even recruited a teenage boy to help them with their sick acts, investigators said. All three men lived in rundown trailers on a farm near Munson, where they sexually abused their own animals for a period of four to five years, Penn Live reported. The teen told detectives he was asked to retrieve the animals, then drop the one of choice into a specially designed chute where the men had sex with them, cops said. He also told police that the trio lured him to their farm by asking for help in caring for the creatures - then ordered him to participate in the abuse, investigators said.