Pig slaves only lived for a few weeks and were humans before the Cult converted them into beasts to abduct more humans which were then used to capture more humans and so forth. Pig slaves had little bits of white porcine-like hair. Pig slaves couldn't talk, only squeal and grunt. When the pig slaves captured humans, the Daleks performed an intelligence scan on each of them. Humans of high intelligence were used for the "Final Experiment", while those of low intelligence were turned into the pig slaves. One individual, Laszlo, was only partially transformed. (TV: Daleks in Manhattan)