Self Loading Hay Wagon

We keep our flock of sheep in our old dairy barn, so we prefer small squares of hay as we store them in the haymow. Our neighbors hay for us, and they use a self-loading/self-unloading hay wagon. As the farm kid who did this all by hand, I'm fascinated every time. The wagon is a New Holland 110 bale wagon, pulled by a Case IH 2096 tractor.