Linked to this post is a pain ethogram by Sue Dyson, an equine orthopaedic clinician and rider. Pain detection is an important skill for all riders and horse owners to have, particularly for those with little handling and/or managing experience, as it is far too easy to miss the signs when we don’t know what to look for in the first place.
https://beva.onlinelibrary.wiley.com/doi/epdf/10.1111/eve.13468
Pain detection