The guinea pig or domestic guinea pig, also known as cavy or domestic cavy, is a species of rodent belonging to the family Caviidae and the genus Cavia. Despite their common name, guinea pigs are not native to Guinea, nor are they biologically related to pigs, and the origin of the name is still unclear.

Entertaining and gentle, the pet guinea pig is vocal and delightful. They have become very popular pets because of their docile temperaments, tendency not to bite or scratch when handled, relatively clean habits and availability. They are sociable animals and enjoy daily interaction.

some of the more common problems of guinea pigs, which include respiratory infections, diarrhea, scurvy (vitamin C deficiency), tumors, abscesses due to infection, urinary problems, and infestations by lice, mites, or fungus.