My horse is having serious issues with saddle fitting and the majority of saddle fitters in my area have been little help. She has a roach back and really struggles to put on weight. The saddle tends to grind into her roach back and cause a lack of muscle build up... I've just been lungeing and riding bareback for the past few months and it has made a difference to her muscle. I really miss schooling her and competing. Is there any advice anyone can give me on how to fit a roach back?