He has two like this: http://www.shespeaks.com/pages/img/r...2011102115.jpg
And two like this (which I believe are marketed for large dogs): http://www.allpetsconsidered.com/Por...large/1476.jpg
He like the dog version the best! I even put ropes on the other two, but the ones with the ropes through the center are the ones I find outside the fence most often.
I thought he would out-grow them, and maybe he will, but right now he is 19 months and plays with them every day. And his 18 yr old mother will sometimes pick them up too.
If the photo shows up, here he is playing with one in the snow. http://www.horseforum.com/horses/pho...e2947_full.jpg
I should have gotten one years ago even for my older horses. I used to have an Arabian that liked to play with things. He would have loved a jolly ball.