I have two baldy heifers that are 75% Hereford 25% angus, one red, one black. What breed of bull would you suggest to use on these to make good freezer beef calves? Absolutely want calving ease, but would like to take full advantage of the crossbreeding. I have been looking at Red Poll, but am not sure if that would help on the yield. I would also like to keep finished size around 1200lbs give or take a hundred. All this on a grass based program, no corn.