I have a 23 year old Standardbred mare. She is long in the body, and started developing a sway back in the past two years, which seems early to me. I am wondering if it is a result from possible injury when she was bred to a Friesien stallion six years ago. She seemed slightly sore for a few months afterwards, but never enough to seek help, and she carried the foal with no other issues. I am just wondering if acupuncture or chiropractic or massage might lessen the progress, or if it's too late now.