The last week in March my 6 year old Thoroughbred mare started going rather unsteadily under saddle. She could not walk a straight line and kept drifting to the right. Tracking left at the trot she could not turn off the rail. She would be very resistive and then trip when she tried to turn. She was also having issues negotiating corners in the arena. At one point she fell so deep into the corner that she nearly ran into the fence and at the next corner she broke from a trot, walked through the corner and then picked up the trot again. Tracking right is not as bad. She can turn off the rail and negotiate corners but her hind end scrambles to keep up. Also when she makes a circle tracking right she can't stay round off my inside leg and the circle turns into more of a hexagon. She is not showing signs of lameness in any of her legs. My trainer advised me to have her looked at by a chiropractor that she trusts and has used for years. Three weeks ago, he came out and made adjustments to her right hip, sacroiliac region, lower back and neck. He recommended hand walking for the first few days and then we could return to light riding (walking and a little trotting). I followed his instructions, however, when I rode her for the first time after her adjustment she was still having the same issues. A week later the chiropractor came out again and made another adjustment to her hip. This time he told me to ride her the very next day. The next day she was actually able to circle left at the trot for the first time in a month. It was choppy and more of a square than a circle but she was at least able to turn. I was relieved until after I asked her to do it again and she could not. She hasn't been able to turn left again since that one time and it has been almost a week. I am going to contact the chiro again and give him an update. Has anyone experienced anything like this? I'm feeling kind of frustrated because my horse has showed little to no improvement and she's had this problem for over a month now.