Bulls, and their close relations, cows, calves, oxen and the buffalo are relatively recent additions to the art of heraldry (and it is not always possible to distinguish between them in their renderings). A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Bull They can be found in a variety of poses and may have horns, hooves and collared in a different colour. The writer Guillim noted that the prescence of a bull could signify “valour and magnanimity”. A Display of Heraldry, J. Guillim, Blome, London, 1679, P117