Border Collies are the best <3 Some of my friends got a puppy a few years ago which I walked 2x a day for them when he was still young, seeing they had a busy schedule. (not for long though, it was only temporarily emergency solution.) But he was so much fun as puppy with his floppy ears. <3 I got so much attention while walking him in the park haha xD They do sheep herding with him now, marathon running, and special days they organise here for people with dogs, you go stand on some sort of flat surfplank thing and then make an entire tour with your dog on the rivers.