Nae
put some trotting poles down just in a small area and do a long lunge in a small portion on the circle it will give them a need to concentrate and make them work up a a sweat so much more. Then jump on him in the round yard as a relaxing walk you can gradually lunge less and get more out of them in a ride.

I have only ever had one bolter but he quickly lost interest when he realised it isnt fun to bolt in a small circle.

LOL I have another problem how to work a seriously out of work pony 12 hands when I am 5'10 lol . Before I get DD riding him?