something like this?
I've never worked with it because we don't work with small bales here but it lookes interesting.
http://www.agriaffaires.co.uk/used/bale-stacker/2007894/doucet.html
I don't have much with horses , more with cows and goats, but these pictures are great.
It must have take you a lot of time to get some of these photo's.
I liked them very much!