Bob,
Encouraging young birds to use their wings is something I believe in too. My brooder is a large stock tank in my greenhouse about 6 feet in diameter.I have a large branch in it. The young Orps love to fly up, and roost. With a breed as heavy as Orps , you have to develop those pectoral muscles early, before they get too heavy to really fly. It's a shame to see so many Orps with very loose wing carriage when it can be prevented.
Making the birds fly always helps the wing carriage, but a lot of times it is more than a lack of exercise. Sometimes it is a breeding problem. I believe that is the case with the Orps I see at shows with poor wing carriage.
Walt