I have a 5 y/o OTTB and I am not sure if he has stifle issues or what is going on with him. He always seems sore when I pick up his back right leg, and when he is ridden he "buckles" it. Feels like he is tripping but it just looks like his Pastern and fetlock are giving out, I think it might have something to do with his stifle though. He also has a lot of trouble with his back lead on flying lead changes. He knows when I ask what to do because he changes the front lead right away, but always has to trot a step to get his back. I can't afford fancy vet procedures, but I was looking for a cheaper alternative maybe if someone has some advice? This is my first post but I am going to try and upload a picture of him "tripping" with a little girl I had ride him. Any advice is much appreciated. Thanks!