In my opinion, there are more than enough things to worry about without
wasting sleep over this.
Same thing could have happened in a plain stock trailer too, had the
horse been tied sideways or loose right?
We all have heard of horses climbing into the mangers of a 2 horse
straight load and getting hurt, also had a friend with a 2 hs, no manger
(just a chest bar) whose horse climbed over the top of it, and did
enough damage to be put down.
I think you just have to accept that trailering horses is a possibly
dangerous event and live with it. Stuffing 1000 lb animals into tin
cans is pretty crazy at any time when you think about it......
tracy