When you saddle your horse, secure your horse's saddle's points of attachment in the proper order to keep the saddle in place. If your horse takes a step when the saddle isn't properly secured, he may feel a shift or roll, and spook. If your horse becomes entangled in the saddle, he may develop a fear of saddling and even risk breaking a leg.
To keep the saddle in place as you tack up, first attach the front cinch, then the back cinch, and lastly, the breastcollar and/or crupper. (Tip: Connect the front and back cinches with a string or lariat so the back cinch doesn't slide back and irritate your horse's inner thighs.) To remove the saddle, reverse the order: Undo the breastcollar/crupper, then the back cinch, and finally, the front cinch.