Opie and several of his friends are trying to sell a patent medicine as part of a contest to win a pony - it's all a scam of course. They're not having much luck selling the stuff and one of the boys returns what he has left. When he receives a letter from the company saying he is blacklisted, they ask Andy's advice. He tells them it's just a bit of intimidation and to just forget about it. Barney however can't keep his nose out of things and along with Gomer, pays a visit to the salve company in Mt. Pilot. They spin a yarn about the salve having a veterinary application but the con men don't quite react the way Barney had predicted
—garykmcd