<Ul> <Li> Pig </Li> <Li> Sus scrofa domesticus </Li> </Ul> <Li> Sus scrofa domesticus </Li> <P> A miniature pig (also mini pig) is a class of pig developed and used for medical research or as a pet . Miniature pigs weigh between 22.5 kilograms (50 lb) and over 68 kilograms (150 lb) when fully grown .' Mini pig' has become an acceptable, if imprecise, term that is used to distinguish the difference between large pigs and smaller breeds such as Juliana pigs, Pot - bellied pigs, Choctaw Hog, Kunekune (and specimens derived by cross breeding with these). There are no breeds called teacup, micro, micro mini . These are all adjectives and not breeds of pigs . </P> <P> In the 1960s, Chinese pigs that grew to be 68--91 kilograms (150--200 lb) were sent to zoos in Western cities and were used for medical research in the fields of toxicology, pharmacology, pulmonology, cardiology, aging, and as a source of organs for organ transplantation . These comparatively smaller pigs were easier to work with than larger pig breeds, which typically reach weights of 300 - 500 pounds . Pot - bellied pigs also became a fixture in many zoological parks where their small stature, sway backs, and potbellies attracted the attention of visitors . The purchase of a few potbellied pigs by wealthy pet owners helped start a new trend in pet pigs . </P>

Is there a such thing as teacup pigs