A horse doesn't need to be visibly lame to have problems that would cause a pain reaction (e.g. bucking). A chiro is great, but I'd also try to get a good lameness vet out there to look at her. Who knows, maybe they could get out there sooner than the chiro could. I guess if it were me I'd also go over the tack really closely, to make sure that something hasn't changed that you haven't noticed. And of course one other thing is that horses do change shape, and it's possible that tack that fit her perfectly a couple of months ago no longer does.
If it were me, I would not ride this horse until you can get her evaluated. If she's just going to keep bucking, then either she is in pain that needs to be fixed, or she is learning that bucking will get her out of work (or both). Neither of those is a good thing. Wait until you know what the problem is and can create a plan for moving forward.
"Saddle fit -- it's a no brainer!"" - random person
Last edited by ACinATX; 08-07-2020 at 11:43 AM.