Gaius:  It appears that the statute treats equally our slaves and our four-footed cattle which are kept in herds, such as sheep, goats, horses, mules and asses.  But it has been questioned whether pigs should be included as cattle, and Labeo rightly holds that they are.  A dog, however, does not fall within this class, and it is much more apparent that wild beasts such as bears, lions and panthers are not cattle.  But elephants and camels are mixed, for they serve a draught animals, but they are wild by nature.  They should be within the scope of the first chapter.