You can use a guard on her if the 10 is going to be to short. You may also just want to clip the areas she sweats the most, say if it is her neck and chest, then just clip those. If she sweats all over and profusely, and you keep her blanketed all the time, clip it all but her legs and face, just make sure your blanket is heavy enough for those cold nights!!! She will look a little funny with a hairy face and legs, but that way you know that her legs and face stays warm since they will not be covered with the blanket.
You know how to make a miniature horse even smaller? Leave them in the dryer a little longer!
"Don't ever regret something that once made you smile"