I haven't watched any online videos of the horrible Olympics horse event (and am likely not to) that everyone is talking about today. This issue is reminding me of these notes I have from a Alexandra Kurland webinar on the tradition of humans PHYSICALLY MANIPULATING animals' bodies to move them, and how we can instead SHAPE / CLICKER-TRAIN animals to move their own bodies, even in small ways, to make them feel more at ease. This gives animals agency, and is a much more humane process.
Also, I have been a big fan of Feldenkrais for years and am subscribed to these weekly lessons . As much as I LOVE getting massages and stretching/yoga, I have had more success getting rid of pain by using Feldenkrais 'Awareness Through Movement' sessions. In becoming more aware of my bodily sensations and learning to move in non-habitual ways (believe me, this intense focus on non-muscular effort can be mentally-tiring!) If I don't fall asleep, I usually always feel 95% better afterwards and gain extra mobility.
Apologies for my terrible sketches of horses.
Also relevant: my horse illustrations for the RSPCA.