In the second to last picture, I'm not looking at the first concho, I'm looking at the rivet that's on the leather part of the saddle. I line that up with the first concho you get to as you move toward the back of the saddle. That rivet on the leather part of the saddle marks where the bar starts, which is what needs to be behind the horse's scapula at MAXIMUM extension. If that rivit is in front of that spot where the horse's scapula is at max extension then you will block her shoulder movement, which will result in her rounding her shoulders forward (a lot of times causing a rotated shoulder) which dumps all the weight on her forehand, thus making her strides short and choppy. Her back will be hollow and she might carry her head up high and bracy.
I was going to say scoot it back also. It's sitting on top of her scapula which was a big problem I had with my boy, it hurts him if it's too far forward. Riding schools ahve a lot to answer for in the way they teach kids to saddle up. It's taken me about a year to break the habit of sitting the saddle too far forward!
I won't comment on any others fit issues as I don't know western saddles. However, some horses are just rolly! My friends little appy pony is the rolliest thing I have ever sat on, I feel very insecure until I get used to it again.
Huh. Well I'm going to ride tomorrow and I'll scoot it back more and see how it goes. How far back? I'm concerned about putting it too far back because she is getting a swayback and I don't want to hurt her back by being in the middle of her back...
When I get some money I plan on getting a breast collar for her to see if that'll help. =)
I used to use a back cinch but then it got taken off the saddle and I never put it back on. Should I put it back on?