We have a new blk. angus bull and a mixed breed herd. I would like to add some new heifers to the herd and I'm thinking about South Devon, Gelbvieh to put some frame size on them. We have some South Devon, Brangus, Hereford mix already.What do you folks think? I would prefer to stick with more docile cattle. Black sells better in our area, but I'm open to other colors to improve our herd.