What is Darwin's thought on cattle?

I'm not sure exactly where darwin stands, but some naturalists believe that every race or variety of plant or animal has descended from a different wild species, but this view is obviously an exaggeration. For example, at this time in England, there existed many varieties of cattle and sheep that did not exist in continental Europe. However, there were no wild varieties of animals in England that did not also exist somewhere else in Europe. If all of the English varieties of cattle descended from unique wild varieties, it is not clear what happened to those wild cattle, since they clearly do not exist anymore.