Oh Elf - that picture!! He's going to find Unicorn school very hard!!!!!
I also would never own or ride an ex trotter again. They are even worse than TBs. They are usually equally crazy but with the difference of being of poor riding horse conformation and having really horrible gaits, especially when it comes to canter. Here where I come from people buy ex trotters when they can't afford proper riding horses and then usually struggle with re-educating them.