I made my own feeder for hunting feral hogs in Virginia. I took a 6 inch PVC pipe, drilled holes all along the sides are various intervals. Capped the one end and drilled a hole in the capped end. Ran a piece of 1/8" cable through and attached that to a anchor stake. Drove that into the ground. Put a screw on lid on the other end and then filled with corn. My PVC pipe was 10 feet long. They roll the pipe around and little bits of corn fall out as they root and roll it around. Takes them much longer to clean up the corn. One thing I did learn about the hogs, at least in Virginia, they were almost impossible to pattern. Too many other food sources there. They were not predictable at all. Oh and put a couple of rocks inside the PVC pipe. They hear them rolling around and think there is still corn in there even when it's empty.