Although classification systems vary, there are generally eight species of goats recognized, as well as six important domestic breeds. All of these domestic breeds are generally believed to have been developed from the pasang, which was likely a native of Central Asia. Relatively hardy, goats can easily inhabit lands that are considered unsuitable for sheep and cattle. Yet, unlike their popular stereotype, goats cannot survive by eating items such as tin cans and other trash. Their diet should consist of shrubs and grasses.