Girl With the Scarlett Letter

I have no idea how to spar.. referring to the guidebook..

Copper liked sparring as much as the next guy, but in the two weeks he had been helping the pack, he hadn't had time to deal with other wolves. But, a friendly spar would be good practice, just in case a wolf game by with bad intentions.

A light shone in copper then. A light his pack mates had doused. The competitive spirit. Copper's tail began waggling with excitement. The force of each swing shook his entire body.
"Sure! I'd love to." Copper was a bit nervous the wolf would hold back on him. He just hoped her gentle nature, and kindness didn't spread over into how she battled.