Am taking him to the vets in the next couple of weeks anyway to have scans etc, but wondering if anyone has seen anything like this and has any idea as to what it might be.
He looks fairly sound in trot, on a tight circle you can see the right hind/left fore diagonal to be a tiny bit unsound, as it does in walk, mainly behind though. Very sensitive on his right hip, and isn't lame after basic flexion tests but trots up lame after swinging the right hind out to the side. From his movement we first thought of kissing spines but obviously he's sensitive on his hip, and also he's a pony and is fairly long backed.
PLEASE can i not get jumped on about one thing or another he IS going to be going to the vets, would just like an idea of what it may be!