From what I understand, the Champion juicer has the wrong kind of auger for juicing wheatgrass. It's capable of juicing wheatgrass, but it will oxidize it reducing its nutritive value. Wheatena makes good wheatgrass juicer, but they are pricy. I got an excellent deal on one on ebay.
"Non-violence leads to the highest ethics, which is the goal of all evolution. Until we stop harming all other living beings, we are still savages." Thomas A. Edison