Both Jewels and Casey are herding dogs.
Funny thing is the different ways they go about it. Whenever we go out for our walks, Casey will go into a stalking position when she meets new people. Jewels doesn't. Jewels normally backs off when people approach but will circle the group.
Jewels doesn't care much for chasing after a ball but will chase after the dogs who are chasing the ball and then bring them back in by nipping at their heels.