you do know how they get purebreeds right? the inbreed the FUCK out of them so they can permanently retain certain characteistics, (and if an inbred human usually has learning disorders, and sometimes physical disorders, what makes you think that wouldnt happen with any other type of mammal?) i have never had a purebred dog that is more willing to learn, and to please its master than so-called "stpid mix breed mutt" i cant believe i just read this thread either, a mod needs to close this fucker down, filled with so much hostility, hatred, and all out stupidity, i cant believe some people in this thread havnt been banned yet...FUCK!