The cows will eat the spiny parts of pigweed, the heads off of OG, millet, milo, and fescue. They'll eat all of the plant of goose grass and even barnyard grass. But the won;t eat the seed heads from crabgrass. Problem is right now all of the crabgrass has gone to seed and that's 90% of what's left to eat. The won;t even reach through the stuff to eat the leaves. I'll bet if I baled the stuff they would think it's candy come winter.