Glad I ran across this post. I was just flipping through a Dover mag earlier and started really thinking about some sort of therapeutic blanket.
I have a fifteen year old that I've noticed can be just the slightest bit stiff after a super long ride, or a show. Not exactly sore, but he just has to work himself out a little bit before he's fully ready to go. Otherwise he's completely sound all other times.
I really like the Schneiders sheet. Glad to hear of some definite happiness with horses using similar things.
"You're just as sane as I am."~Luna Lovegood.