Some cattlemen think that using corn to make ethanol could not be the drain on resources that others believe will be the case. They believe that if the price of grains remains low then it makes sense to feed them to cattle. Ethanol makers will only be able to keep the price reasonable for distillers grains if there is no alternative but to feed them to cattle. But, there's a lot of energy left in the grains and you can quite easily make biodiesel out if them... It will be interesting to see if the US price of beef rises as alternative energy uses are found for distillers grains.