Hi Dusty River. We don't feed range cubes but did try using a 12 volt feed dispenser called a "trip hopper" for a time . It was many years ago. Our feed was "lofty" and would constantly bridge. I think cubes would work fine. This thing was big and about 5 ft tall and wide. and we mounted it on a tall, 4 wheeled trailer. If I recall correctly, they have a variety to choose from.. I think they may have been out of Texas... collie
edit : found it ! http://www.tsfeeders.com/ we had the one shown in the back of the truck called truck model.