Attacked? I think it is great that you want to ensure your horse's comfort even if the saddle "seems" like it fits :)
Sit your saddle on your horse, no pad.
Generally speaking, you want to be able to fit 3-4 fingers between the horse's withers and the pommel of your saddle. You want ample wither clearence for obvious purposes. Culprits of a too-low pommel could be a number of things from the tree being to wide to the width of your horse's shoulders.
If you look at the saddle from the rear, you should be able to see light through the gullet channel. The panels should rest clear of the spine. I like to see about 1/4-1/2" distance from the spine to allow for any surrounding tissues.
Viewing the saddle from the front, it should rest evenly over your horse's shoulders, with not gaps. Running your hands between the saddle and the horse, you should feel even pressure throughout (no pressure points).
Veiwed from the side, the pommel should sit a bit lower than the cantel, but not a huge amount, just slightly. Also, note how the back panels are resting on your horse's back. They should make contact all the way to the back of the saddle, not raise up or anything like that. Even contact, no pressure points.
Sitting on the saddle, sometimes fit can change. Make sure there are no pressure points as your sit in it.
That's all I can think of for now :)
I've had to learn as much as I could about saddle fitting, because there are no professional fitters in my area :(
There are some good youtube videos out there. (and some bad ones, be careful lol)
ETA: Dang you guys! Posting more quickly than me!
Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world. ~Harriet Tubman
Last edited by Eliz; 03-17-2011 at 10:51 PM.