Do you need to know more about Guinea Pigs? I found article about this pet at wikipedia,here’s review about Guinea Pigs or Cavy:

History
The common guinea pig was first domesticated as early as 5000 BC for food by mountain tribes in the Andean region of South America (present-day Ecuador, Peru and Bolivia).Statues dating from ca. 500 BC to 500 AD which depict guinea pigs have been unearthed in archaeological digs in Peru and Ecuador. The Moche people of ancient Peru worshipped animals and often depicted the guinea pig in their art. From ca. 1200 AD to the Spanish conquest in 1532, selective breeding resulted in many varieties of domestic guinea pigs, which form the basis for some of the modern domestic breeds. They continue to be a food source in the region; most households in the Andean highlands raise the animal, which subsists off the family’s vegetable scraps in kitchens. Folklore traditions involving guinea pigs are numerous; they are exchanged as gifts, used in customary social and religious ceremonies, and frequently referenced in spoken metaphors.They also play a role in traditional healing rituals by folk doctors, or curanderos, who use the animals to diagnose diseases such as jaundice, rheumatism, arthritis and typhus. They are rubbed against the bodies of the sick, and are seen as a supernatural medium.Black guinea pigs are considered especially useful for diagnoses. The animal may also be cut open and its entrails examined to determine whether or not the cure was effective. These methods are widely accepted in many parts of the Andes, where Western medicine is either unavailable or distrusted.

Spanish, Dutch and English traders brought guinea pigs to Europe, where they quickly became popular as exotic pets among the upper classes and royalty, including Queen Elizabeth I. The earliest known written account of the guinea pig dates from 1547, in a description of the animal from Santo Domingo; because cavies are not native to Hispaniola, the animal must have been introduced there by Spanish travelers. The guinea pig was first described in the West in 1554 by the Swiss naturalist Konrad Gesner. Its binomial scientific name was first used by Erxleben in 1777; it is an amalgam of Pallas’s generic designation (1766) and Linnaeus’s specific conferral (1758).

The scientific name of the common species is Cavia porcellus, with porcellus being Latin for “little pig”. Cavia is New Latin; it is derived from cabiai, the animal’s name in the language of the Galibi tribes once native to French Guiana. Cabiai may be an adaptation of the Portuguese çavia (now savia), which is itself derived from the Tupi word saujá, meaning rat.Guinea pigs are called quwi or jaca in Quechua and cuy or cuyo (pl. cuyes, cuyos) in the Spanish of Ecuador, Peru and Bolivia. Paradoxically, breeders tend to use the more formal “cavy” to describe the animal, while in scientific and laboratory contexts it is far more commonly referred to by the more colloquial “guinea pig”.

How the animals came to be thought of as “pigs” is not clear. They are built somewhat like a pig, with a large head relative to the body, a stout neck, and a rounded rump with no tail of any consequence; some of the sounds they emit are very similar to those made by pigs, and they also spend a large amount of time eating.They can survive for long periods of time in small quarters, like a ‘pig pen’, and were thus easily transported on ships to Europe.

The animal’s name carries porcine connotations in many European languages. The German word for them is Meerschweinchen, literally “little sea pigs”. (The Polish Å›winka morska and Russian Ã?¼Ã?¾Ñ€ÑÂ?Ã?ºÃ?°ÑÂ? ÑÂ?Ã?²Ã?¸Ã?½Ã?ºÃ?° mean exactly the same.) This derives from nautical history: sailing ships stopping to reprovision in the New World would pick up stores of guinea pigs, which provided an easily transportable source of fresh meat; Meerschwein is German for porpoise, which was another food source for sailors. The French term is Cochon d’Inde (Indian pig); the Dutch used to call it guinees biggetje (Guinean piglet) or Spaanse rat (Spanish rat) in some dialects, and in Portuguese the guinea pig is sometimes referred to as porquinho da ÃÂ?ndia (little Indian pig). This is not universal; for example, the common word in Spain is conejillo de Indias (little rabbit of India / the Indies).

The origin of “guinea” in “guinea pig” is harder to explain. One theory is that the animals were brought to Europe by way of Guinea, leading people to think they had originated there. “Guinea” was also frequently used in English to refer generally to any far-off, unknown country, and so the name may simply be a colorful reference to the animal’s foreignness. Another theory suggests the “guinea” in the name is a corruption of “Guiana”, an area in South America, though the animals are not native to that region A common misconception is that they were so named because they were sold for the price of a guinea coin; this theory is untenable, because the guinea was first struck in England in 1663, and William Harvey used the term “Ginny-pig” as early as 1653. Others believe “guinea” may be an alteration of the word coney; guinea pigs were referred to as “pig coneys” in Edward Topsell’s 1607 treatise on quadrupeds.