I did an experiment once with some horses that were on restricted hay. I gave them half a bale, on the floor, the first night and they ate it all so the next night i gave them more, again it was all gone in the morning. The third night i gave them a whole bale and there was about half of it...
If it was me i would have him turned out as much as possible and if he is in make sure that he has adlib hay/haylage. Racehorses notoriously have ulcers from lack of fibre in their diet. I would also not feed any cereals as this can really fizz up thoroughbreds, when he starts to put on more...
Whatever is said about Monty in the press or books no-one can dispute that is methods do work. It has been tried and tested time and again. In demonstrations, as has already been said, Monty chooses the horses that are going to show his methods can work and in a short period of time. He does...
.........Sorry meant to add that i do a lot of longreining,especially with young horses, and feel that i am quite experienced - i always use a Dually halter and never a bit.
Not a bitting expert either but i do know that you need to bit according to the amount of room your horse has in its mouth - i.e. how much room the toungue takes up. Also that a snaffle is not necessarily a gentle bit as it pinches on the tongue. If you look at it when it is not in the horses...