I forgot to put this in one of my previous replies...
But technically speaking MOST of our captive pets are actually "exotic", when you go by the biological definition which means something "alien" or not native to the area. All dogs, cats, livestock, rabbits, rats, mice, many reptiles, many fish, and most (all?) captive birds would be considered "exotic" under that definition. Being a biologist I really default to that definition. "Exotic" is not the opposite of "domestic", something can be both "domestic" and "exotic". Likewise a "native" species is not necessarily "domestic", but a "native" species can never be "exotic".