Poppy had quite a sway back which was made worse by a previous saddle. If you look you can see the overall appearance is more rounded as the horse is able to work through her back and use the quarters more effectively. Just behind the shoulders and above the loin area the muscle tone is now coming through. The saddle has already needed to be widened to allow for the new muscle development.

 In these pictures if you look at the line behind the shoulder and along the back you can see the muscle tone coming through.