what surprise did billy get from his dogs as he started to go hunting for the first time?

Billy leaves after dinner and sets his dogs free on the trail. They soon track a coon, but the coon loses them with a trick. The dogs quickly figure it out and trail the coon, but the coon eludes them again. Just as Billy packs up to leave, they chase the coon again. They tree (send up in a tree so it cannot escape) the coon.