Will a horse build muscling behind the shoulder?
I recently purchased a new (used, but new to me) saddle. It fits my gelding wonderfully except for an area of less pressure just behind his shoulders. So I was wondering if this is an area where he could develop muscle as we do more conditioning (as he's only had a few months of light work up to now) and therefore I should just shim in the area for now and wait to see what he looks like in 6 months of steady work, or if I should have a saddle fitter re-flock the saddle (it's foam, so not an easy task) to fill in that space if it will not change?
The horse is 6 years old and at a good weight right now, but he is definitely in need of some more muscle tone in most of his body. I just don't know enough about horse muscle development to know if that area will fill or not.