I had been working with Snickers for a while (couple of months) without the assistance of my trainer because of money issues. Anyway, Snickers used to fall on the forehand very much and didn't want to involve his hind legs at all, so it was a major issue in our training programme. I didn't feel we were going anywhere with that, so I gradually switched from riding to groundwork (also because he needed less exercise because of malnutrition in the stable of his previous owners), putting a stress on ground poles, elevated ground poles and different exercises to make him more supple and willing to go. Last weekend my trainer visited us in our new barn, saw us riding and complimented that he was no longer on his forehand and was involving his hind legs noticeably! Huzzah! All that groundwork really pays off!