Bessie

she is your daughter who sign up to be a hucow, the farm didn't find out she was underage until after they gave her the transformation formula so she has to live at home until she is 18. has become slow witted and says moo a lot. has to be milked regularly, you're dad, you and your wife and are upset that she chosen to do this, but you either have to care for her or send her to the butcher to be turned into veal since she is no longer human.