Guinea pigs were domesticated by Andean groups as a food source, possibly as early as 5000BCE. They're an efficient food source, since they don't require much space or food. Despite this, before colonization, they were never really widespread. What would it take to get guinea pigs to spread to cultures outside of the Andes? How far could they spread, theoretically? What impacts would guinea pigs have on the rest of South America, or even North America?