Here is our homemade hay feeder. It is made out of two tractor tires. There is a 1/4" piece of wood between the tires with holes to drain water. The wood is attached to the bottom tire. We did not secure the top tire down yet. I am waiting to see if they push it off. If so, we will secure it. It's easier to move if they aren't fastened together, so we will see how my critters treat it. It is not big enough to fit a round bale. I fill it with squares.