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Does anyone use under their saddle that rubber stuff you put under rugs or mats to stop them slipping? Does it work? My ponies saddle is slipping terribly. And yes it fits. She's just round and has no withers.
Look on Old Mill Saddlery at the racing non-slip pads. Work brilliantly, you can't cut them to shape if you don't want the big rectangle and are a darned site cheaper than any of these fancy smancy things you spend a fortune on.