A horse that pins its ears, swishes its tail, moves away, or turns to bite during saddling is communicating clearly. The question is not whether to take it seriously — the question is whether it is a pain response, a learned behavior, or both.
The majority of horses resistant to saddling have a legitimate physical reason. Saddle fit problems, back soreness, girth galls, and anticipatory pain from previous discomfort are all more common causes than purely behavioral issues. Rule out physical causes completely before pursuing behavioral solutions.
Most common physical cause. The horse anticipates the pinching sensation as soon as the saddle approaches, especially when the girth is tightened.
Skin damage in the girth groove creates intense sensitivity. The horse connects the saddle with the pain of girthing and reacts at the sight of either.
Any pressure on a sore back is uncomfortable. This is appropriate, not problematic behavior.
Shifted or packed flocking creates focal pressure points not obvious from outside the saddle but creating real discomfort under load.
Learned behavior characteristics: identical resistance regardless of which saddle is used; no detectable back soreness; resistance disappears with a different handler; horse works freely under saddle once saddling is complete.
Pain-driven characteristics: resistance varies by saddle; detectable back soreness; more resistance with the worst-fitting saddle; performance problems under saddle corresponding to the fit issue.
Test the horse's response with a saddle known to fit correctly or a well-padded bareback pad. If resistance disappears or significantly reduces, the current saddle is the problem. If resistance is identical regardless of what is placed on the horse, the cause is behavioral.
David Solum has been evaluating saddle fit problems for 40+ years. Call, text, or email him directly — he can advise on whether it's a fit issue, a tree problem, or a saddle you should replace.
See also: Free Saddle Tools · How to Fit a Western Saddle · Parts of a Western Saddle · How to Buy a Certified Used Saddle