12/12/2025
The Ridden Horse Performance Checklist
5: The mouth opening and shutting repeatedly with separation of teeth, for ten or more seconds
Research shows that if 8 or more of this list of 24 ridden behaviours are shown, it’s highly likely that the horse is in musculoskeletal pain.
Find out more on the Harmonious Horsemanship website.
The Ridden Horse Performance Checklist is adapted from:
Dyson, Sue & Berger, Jeannine & Ellis, Andrea & Mullard, Jessica. (2017). Development of an ethogram for a pain scoring system in ridden horses and its application to determine the presence of musculoskeletal pain. Journal of Veterinary Behavior, 23. https://doi.org/10.1016/j.jveb.2017.10.008
More than just a fuss about the bit.
Horses might open their mouths for a number of reasons—but when you see the mouth opening and shutting repeatedly, with the teeth parting, for ten seconds or more during ridden work, it may be a red flag.
This is one of the 24 behaviours identified in the Ridden Horse Pain Ethogram (RHpE), and it’s strongly associated with musculoskeletal discomfort. The repetition and duration matter—this isn’t momentary resistance, it’s a message worth hearing.
That’s why I co-wrote Harmonious Horsemanship with Dr Sue Dyson: to help horse owners notice the signs that matter, and respond with kindness, clarity, and care.
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