Originally Posted by AQHSam
Faulty saddling on your part is not a reason to hate the western saddle. I just completed a 3 hr ride across steep terrain and my saddle never slipped.
Faulty saddling isn't the reason, that was the cause, it was the slipping and falling that makes her hate the saddle,
You have some great advice, and being the owner of many a fat haffy you have my sympathy. You have been given some great ideas, breast collar is a must, some sort of thin sticky pad under the saddle, fleece pads and fleece cinches seem to slip far easier I think, so leather, neoprene or mohair cinches are my favorite.
As other have also said, cinch, wait, tighten wait and walk and tighten again.