Derek was hot on his trails easily, catching the pet's scent easily. He caught up with him easily, letting Stiles think he's head for a small time before tackling his pet to the ground and pinning him on his back. The werewolf wasn't even out of breath as he looked down at his newly bought slave. "And now you've just lost your dinner," he informs Stiles with a sigh. "I'm not going to say I'm surprised you ran. I was expecting it."