Top of Scapula Distorting Fit
This happens in both flat backed and high withered horses, but the horse will invariably have a prominent wither.
This usually happens when the horse carries a lot of flesh on its shoulder and is not common in dressage saddles – the further forward cut the saddle is the more this is likely to happen and happens to a greater or lesser extent in many horses where the withers are fairly prominent and the shoulders quite broad and well muscled. Many Eventers and Show Jumpers suffer from this - it is not always seen as the saddle slipping back significantly but the saddle is moved slightly across the back every stride, as the shoulder comes back and this creates soreness up against the spine. Saddle Moving Backwards
Saddles with this feature are The Advanced Competitor, The Event/Hunt Saddle Mark 2 and Mark Three, The New Grandee, The Nyala, The Pony Pro