I've been watching neighbors buy 'teacup' pigs, only to see them grow into hundred-pound animals they can't handle. It makes me wonder if keeping exotic pets like these is ever ethical, even with good intentions. Zoos and sanctuaries exist for a reason, and they have trained staff and proper enclosures. But some argue that responsible owners can provide a good life too. Is the line just about the species, or the individual caretaker?