At what point does an life form become a pet? Can a particularly mobile carnivorous plant be a pet? If you refuse to take down a spider web and shoo flies toward it, does the spider become a pet? If you release ladybugs in your apartment to cull aphids, are they pets? If you briefly tend a goat to sacrifice it to Morlak, lord of dreams, to steal everything but your landlord’s nightmares, is the goat a pet?