At home Loki will play fetch, but at the dog park, Loki doesn't. He'll chase after the ball, but not retrieve it. This means I end up fetching the ball and tossing it again. As if that wasn't bad enough, Loki played "keep away" with me today! As I reached over to pick up the ball, he would quickly snatch it away and then drop it a mere two feet away from me. Repeat a few times.
Hm... not a fun game.