Thanks! Most of what I’d read in passing made it sound like there was an established connection to symptoms. I guess it’s not that simple!
Examples:
All You Need to Know About the Hidden C6-C7 Malformation That’s Bringing Horses Down
“This study has clearly demonstrated that the L.colli muscle has altered its points of attachments and loss of function in the presence of the congenital malformation in C6 and C7. The potential ramifications are neurological dysfunction, loss of performance and potential harm to horse and rider.” (To be fair I see that this says “potential ramifications,” but it still sounds pretty scary!)