Uhg, I know, the weather here is AWEFUL! And I don't have access to an indoor arena so it REALLY stinks! *sigh* It is going to get up to 67 degrees by the weekend I believe, so maybe there is still hope for a fall! lol.
Just from my personal experience, with the dressage friends I have (who have "lazy" horses to boot), if their horse gets bored, thus lacking impulsion and drive, they get out a whip or they strap on some spurs to MAKE them go forward. Now I know that's not how all people are, let me make that very clear! And some horses truly do love learning dressage. However dressage, for a lot of horses, is pointless in their minds because it uses consistent patterns and doesn't offer a lot of variety which makes horses, like my guy, wanna shoot themselves lol! They NEED variety and if we just do the same thing, day after day, we can't blame them for getting bored. So it's up to us to 1) make our horse's lives interesting and fun and 2) to play in a way that allows the horse to find that "sweet spot" while working on dressage that makes working on it MEANINGFUL. Dressage, done right, feels good to the horse, but they don't know that until we help them find that spot of balance. With my guy, working on Finesse riding is becoming more meaningful and fun for him because I'm helping him see that even if I have contact on the reins, he can still access this spot of balance and it feels good....but I make darn sure I don't drill it and work on it every time, otherwise he gets bored VERY quickly and then I lose his positive attitude and any impulsion I had.