OK, so I finally ran out of Goat Chow and want to switch to real whole grains. I had planned on feeding: 35% Barley, 35% Whole Oats, 10% BOSS, 10% Cracked Corn and a little bit of Calf Manna sprinkled on. Problem is, no one carries barley around here--something I hadn't considered. So what can I substitute for barley? Just more oats or something else??