A cat, or house cat, is a pet, one of the most popular “companion animals”. The domestic cat is a mammal belonging to the big cat family. In the past, a house cat was often viewed as a separate biological species. The house cat is a subspecies of the forest cat. As a lone hunter for rodents and other small animals, a cat is a social animal that uses a variety of sound signals to communicate. There are currently around 200 cat breeds worldwide, from long-haired to hairless, that are recognized and registered by various organizations. Cats have been valued by humans for 10,000 years, also for their ability to hunt rodents and other domestic pests.