I was always told that horses will never pee in a float, and that you should always whistle to convince a horse to pee before you put it on a long float journey.
However, just the other day my friend was treated to the disgusiting sight while driving behind me of gallons of pony pee cascading out from under the door of my float. Sadly not video was available, but the event was repeated a few weeks later when driving out from the gates of a large show, we stopped momentarily to open a gate and heard hyterical laughter behind us as my horse once again treated innocent fair-goers to a yellow waterwall on the road.
So my question is, is this common? Or have I just never heard of it?