Took her down to a good chiro who happened to have a same-day opening today. As I suspected, her pelvis was out. Also, her sacrum, entire lower back and TL region, right side of her neck, her hock clicks and pops, and as usual her left scapula was "tight". She worked on her back a bit and she loosened up enough that she was mostly standing straight. She still wants to curl to the right with her tail and butt/extreme lower back area though, which is a brand new and STRANGE behavior. I am keeping on "loose in the yard to potty + leash walks" only right now until we figure out this weird kink. She does look much better with her pelvis straightened out and her back loosened up, but she's still doing it. The chiro did tell me she's seen dogs do weird stuff similar to this because of an anal gland impaction, so I'm taking her in tomorrow morning to get that checked.
Next step will be a set of x-rays at my regular vet who sort of specializes in ortho stuff. He's not VOSM level specialist but he is competent to take shoulder/back/pelvic area x-rays I think. We can at least make sure there are no bone chips anywhere or major arthritic changes. If she clears those, then she sees Ria next week, and assuming she's doing as well as she was before this set-back we have a new plan in place involving the agility and rehab. We are going to try actually increasing the frequency of her agility sessions, but keeping them short. Trying it on the theory that perhaps she needs to build up specific agility-related muscles that can't be done by regular rehab and strengthening exercises. Anyway, we'll give it a shot for a while, once we've looked at x-rays and had a clear check from Ria again anyway.
If Seri CAN be brought back to the point of being to show in agility once every month or so, I would be thrilled, as she is so fast she's competitive even with wide corners. If Seri CANNOT be brought back into agility competitions, then so be it. She is who she is and I won't force it. I am certainly going to try though. As difficult as she is, she LOVES the sport (too much, sometimes) and I enjoy running her, even if she can be frustrating at times...
So yet another setback. I am finding it is useless to make concrete goals with Seri, it is better to just go at her pace.