My mini just came back from 90 days at the trainer. She had him in a stall eating good hay only and turn out in a dry lot. Before that he was on pasture about 5 hrsa day and very chubby. He's in the best shape of his life now. I don't have a dry lot but I want to turn him out for exercise and to be a horse. How do I transition him to a few hours of turnout without risking laminitis? I'm really wrestling with this.