The pot-bellie pig is a breed of domesticated pig originating in Vietnam with fourteen sub-species. Considerably smaller than standard American or European farm pigs, most adult pot-bellied pigs are about the size of a medium- or large-breed dog, though their bodies are denser at a weight of 60 to 300 lb (27 to 136 kg). Pot-bellied pigs can be easily discerned from other pig breeds by their size, upright ears and straight tail. The top photo on this page shows a pig that is not within the proper weight range. Pigs with fat rolls over their eyes or a belly that touches the ground are easy visual indicators that the pig is overweight. Although they have a pot belly and a swayed back, it is not indicative of weight. Pigs in proper weight still have the sway and belly, but the hip bones can easily be felt with minimal pressure and the eyes (whole socket) should be easily visible.