Just back from taking dog for a walk. About halfway through she started stretching out her legs behind her (and kept doing this for the rest of the walk), walking awkwardly on her left hind leg (but not the paw IYSWIM) and not running about like an eejit as normal.
She seems otherwise happy and her usual self. She's 4.5 years old, mixed greek hunting dog type, and hasn't had anything like this before. She did vomit yesterday evening on DH's favourite rug but I don't think it was connected.
I'm obviously going to keep an eye on it and go to the vets if it doesn't improve or gets worse, but wanted to see if anyone had any ideas what it could be or how I could help my poor girl.