Had a big load of sand bro't in for the pen which is in the pasture. The gate was left open and the horses went in. I have never seen such shenanigans as those two with something new. One, after extensive pawing would start to go down, change his mind, and tear around like a mad man. The other did the same but instead would squeal and buck on the spot. The one suddenly left the pen going flat out, circled around and back to the sand only to paw at it and race around. The entertainment lasted about 20 min. So nice to watch.