Do you have a cat? They are often called house cats when kept as indoor pets, i have had one, a rescued cat from a shelter 
I do have a cat, and he is a indoor cat as well.
control the breeding of pet cats by spaying and neutering, as well as abandonment of pets, has resulted in large numbers of feral cats worldwide, contributing to the extinction of entire bird species, and evoking population control.
It was long thought that cat domestication was initiated in Egypt, because cats in ancient Egypt were venerated since around 3100 BC.
However, the earliest indication for the taming of an African wildcat ("F. lybica") was found in Cyprus, where a cat skeleton was excavated close by a
Litter box
A litter box, sometimes called a sandbox, litter tray, cat pan, litter pan, or catbox, is an indoor feces and urine collection box for cats, as well as rabbits, ferrets, miniature pigs, small dogs (such as Beagles and Chihuahuas), and other pets that instinctively or through training will make use of such a repository. They are provided for pets that are permitted free roam of a home but who cannot or do not always go outside to excrete their metabolic waste.