Because fresh meat (us, humans) is tastier and gives a lot less of problems We'll get to be like in the Mass Effect story... all the races were just a breed to be harvested. Hope not... I'll assasinate OP if the story goes this way lol, even if it's a good one.
(Quote from Vishnu) RP Mode+sarcasm warning: Vishnu is our new official (super)dog... he eats the toilets instead of just the water inside. Maybe he didn't found the water in DK ones, well, that's because there's no "water" Dogs are a cop's best company, so it's great to have him with the Cops side