No riding today.  So that every time I go into the paddockand put a halter on him he doesn't think it's groundwork or riding, I often take him out for 'pick'.  He appreciates the lush green grass we find.  Interesting today for I clicked him up to move him on to another patch without putting any pressure on the line.  He was a bit sluggish first time and very quick the second time.  It was the reward of going to another greener patch which worked as the reward.  The click and bridge was my kissing him up to move.  He does know 'kissing' means move but when he's rewarded with fresher pick it was rewarding (to me) to watch with what alacrity he moved the second time.  Who says horses are dumb?