I've never seen a dog swam in a keep, though I do know of a man that did it once for a female much like EWO describes.

Widerange, just out of curiousity, how come swimming does NOT put the dog in the condition to win? Is it because the thought process of being in the water and being cooled down? Swimming isn't exactly something easily done for 2 hours, if not more, if done correctly. So while I've never done it, I certainly wouldn't discredit it without every trying it.