I would buy this from the UO store!
I recently bought a Dreadmare. It was trained and scrolled. Whoever did it wasn't really thinking things through apparently and added stuff that isn't useful. I would love to see a token in the store that would allow you to 'untrain' a pet. Could be a couple different tiers. one could wipe it clean, one could wipe specials and one could wipe scrolls. I bet a lot of people who either messed up training or changed their mind after training or bought a pet that was messed up would buy them. Food for thought.