I have no problem with a polled or horned bull. The best quality will no doubt be the best bovine. I feel that Shorthorn bulls compliment a predominanty angus program as well as any bull if you use the right kind. I raise shorthorns and have a commercial herd that are serviced by Shorthorn and...
I have had two calves that look like that before. I am not sure that it was the cure but I gave them a shot of selinium (BO-SE or MU-SE), and they came around just fine in a few weeks. Until then I just let them go and they did just fine.