Read the specifications, among other things I don't like the sound of, they have electrical facilities inc v low, in the cab,
which would enable shocks to be given.
http://www.zercustoms.com/news/Roush-Race-Horse-Training-Car.html
A good jockey or work rider will always know if a horse should be pulled up - this machine won't. And it is also imo quite likely to make a horse panic, perhaps with fatal consequences, or push a horse beyond what is wise. It's been developed in the first instance for use in Turkey, not a country known for its kindness to animals.
I wish I'd never seen the damn thing, since there is nothing I can do to get it banned