Hello~ I have a 13 year old beautiful Percheron mare that I am hoping to breed with a registered thoroughbred to create an American Warmblood. I am looking for a future dressage prospect so I would really love to breed her to an accomplished Thoroughbred stallion. Any suggestions please? Thanks!!
You might try the sport horse breeders forum 
Percheron / TB crosses can be really nice. Try the Sport Horse Breeders threads (further down on the forums front page).
http://www.superiorequinesires.com/stallions/mightymagic.shtml
http://www.superiorequinesires.com/stallions/likoto_xx.shtml
http://www.superiorequinesires.com/stallions/mountetna_xx.shtml
Don’t know where you are or if he’s still standing, but I’d also consider Default in Virginia. He certainly has one of the best TB pedigrees in the US for dressage.
