I broke down and finally bought some Tumble wheels for winter grazing a circle of sorghum mix. I am grazing 116 head on a 1/2 acre per day.
I have to say they are easier than I thought they would be. Well worth the money.
Made one mistake though, I took my wife. She said since feeding only takes 5 minutes a day she had some projects for me around the house.
Click to see: Tumble Wheels working