I got pulled away on an expected trip, but I see there are lots of interesting observations on the question. The slomo horse action shows the regular gait really clearly. I'm usually posting when all of the UK members (most of you) are sleeping, but on the night I posted the question I did a bit of googling. Apparently it's a normal gait, mostly called pacing but in one vid, called ambling. Fraser does it when I have him slowed down and walking ahead of me, but with a shortened leash. It always looks like a 'controlled' walk. He'd like to go faster, but is holding his pace down to mine. When he's just rambling around, but on a long leash, he does the usual diagonal gait in a walk or a trot. I love his task trot when he's bringing something to me or doing a find. Then he does a very rapid, 'all business' trot. So cute.