Join Date: Mar 2010
Location: knee deep in spring mud
• Horses: 0
So sorry but no, I am not sure that your saddle, as is, is the best fit. Many reason for this from never fit in the first place to horse has changed shape to rider compensates consistantly ( like myself : ).
This is not to say that you must run right out and invest in a new saddle just yet. It is possible, tho on a strong suggestion, that if you were to find a suitable saddle fitter, they can advise how to reflock your panels, provided the deficit is within normal limits. Second to a reflocking and more likely after having it done, appropriate saddle pad(s)* can help. Talk to your local tack shop, vet, chiro, or a reputable show stable to connect with one if you choose to go this way.
* I caution here on the plural. Too many pads are like too many socks on a bunion in an already tight shoe. NOT good. More padding without being pretty close to ideal to start with can create more problems, not solve them. From where you say your mare's back is sore, I agree with HoneySuga: very possible it is your saddle.
On a side note, be sure to "rotate" several saddle pads if you can, "specially where the fit of your saddle might be sketchy. The pressure points of your saddle can create breakdown of the stuffing in the pad and this in turn adds to a saddle's fit issue. Depending on the thickness and type of stuffing, of course.