How to mix large batch of feed

[farmerbrowne]

Howdy yall,
Last night, not thinking (was late and too damn tired) I loaded my chest freezer with the 400 pounds of feed mixes I bought and didn't mix as I went along. Has anyone ever found an easy way to blend over 400lbs of feed evenly? I was thinking of welding two metal plates together on 90 degree to a pole so I could shove it in and turn to mix it all.

 

[Fairview01]

Ice fishing auger would probably be fastest and most expensive but the largest flower bulb auger attached to a good powrer drill would do it also, albeit much slower.