Rats
Specially bred as pets since the 18th and 19th century, fancy rats now come in a wide variety of colours and coat types and there exist several rat fancy groups worldwide. Fancy rats are commonly sold as pets in stores and by breeders.
Domesticated rats are physiologically and psychologically different from their wild relatives, and—when acquired from reliable sources—they pose no more of a health risk than other common pets. While fancy rats are subject to different health risks than their wild counterparts, they are consequently less likely to succumb to other illnesses prevalent in the wild.