Roundness

It's been a bad day, and I'm not much in the mood for clever grammar, witty quips, or italics, so this is going to be short, and to the point. I rode Ziggy today, and in my warmup, something just didn't seem right. So, I called Zhizhu to come out and watch Ziggy for a while. Long story short, he was off. Of course, I immediately dismounted, untacked and cold hosed all 4 legs. It looks like it's something in his back end. He does have two little cuts just below his fetlock on each leg that are swollen, which might be the problem, but I'll be setting up an appointment with the vet.