Arwen is manic for swimming. Compared to her, Soleil, for her part, is rather blasé about the whole endeavour: though she enjoys it thoroughly, she's not in the same league as Arwen, and Arwen often takes over and brings in Soleil's retrieve if Soleil is too slow, or considers the distance too far for her taste.

Arwen is very methodical. She's little as Labradors go, and her mouth isn't big enough to carry both balls. So she carries one and very methodically and efficiently herds the other, churning with her front paws to direct her quarry. When she gets close enough to shore, Soleil comes out and Arwen very efficiently checks that all is in order and passes the ball off in a quick flick of her nose, and Soleil takes over. It never fails to entertain and enchant me; many if not most people don't credit dogs with reasoning skills, but in my mind, they simply aren't observant enough.