Last fall horse started bucking in the canter, primarily left lead. Did diagnostics which were unclear, we injected stifles and had previously injected SI. We also tried mesotherapy as he was palpating sore across his back. Finally just gave him the winter off and he’s had six months of no work while I just did massage and stretches on him which he loves.
We’ve now started back into work and while he feels better, the left lead canter is still not right. He wants to swing his haunches in, pins his ears, threatens to buck.
On the lunge line he looks perfectly sound. At the trot on lunge and under saddle he looks and feels perfectly sound. Only time he acts uncomfortable is under saddle in canter, much more so on left.
Flexions have been mildly positive RH but not significant. Radiographs of stifles didn’t show anything out of the ordinary.
I have not radiographed hocks.
Horse is seven and was fit and showing at a low level when this behavior started last year. Looking back at my records, we started various therapies (SI injections, meso, then stifles) mid summer last year when he started showing resentment in lead changes. Seemed to help but then in the fall he progressed to not wanting to canter at all.
What would your next steps be? Where would you be looking?
To recap, the horse feels better after six months off, there is no lameness evident at trot, but still something going on in left lead canter under saddle only.