The sub-discipline of zoology that deals with animals living in human households is called "household zoology" or "synanthrope zoology." It is a branch of applied zoology that focuses on the study of animals that live in close association with humans, such as pets, pests, and commensals. Household zoology encompasses various fields of study, including animal behavior, ecology, evolution, and veterinary science, and aims to understand the interactions between humans and animals in domestic settings.