Humans can't digest grass. While we do feed cows corn for at least a portion of their life, it doesn't need to be as prolific as it is. But we also feed them

Humans can't digest grass. While we do feed cows corn for at least a portion of their life, it doesn't need to be as prolific as it is. But we also feed them things like beet pulp pellets and molasses - both of which are by products of sugar production. Unless we are going to stop eating sugar what else would you do with this waste?