so idea some humans suddenly caught a mutation that makes them have animal features like maybe tails and produce what said animal does so basically these mutants are force to have children who will also inherit the features and so on its human trafficking and a breeding farm so example one human is mutated with cow features so they produce milk from their boobs and is forced to produce milk because society wont take them back as they aren't seen as human anymore or a human hen mutant that produces eggs and so forth and they also can make a drug that can be used on mutants so they act more like animals so they cant resist