Join Date: Oct 2011
Location: Illinois www.saddleonline.com
I wouldn't say "tight" under the bars, but you don't want big gaps either.
When you say "between the bars" do you mean on either side or is it too low for his withers? You could try a saddle with more wither clearance if you are sure its not too wide. The bars of the saddle shouldn't affect where he is able to put his head (head-set-wise). If they do, you have a fit problem :)
The shape of your horse can change quite a bit in two years, its possible that something that fit perfect two years ago, no longer works.
You could always see if a breast collar helps the slipping issue, but that could be a side affect of a fit problem.
We have a bunch of new breast collar headstall sets in if you want to take a look!
We would be more than happy to help you with new wither tracings!
"Riding: the art of keeping the horse between you and the ground."