Our 17.1 hand PRE mare is a fabulous mare. She does have a little extra personality & pzazz, she can also be a little spooky mostly at nonexistent things. I want to tell you what a difference the Support Pro has made in her attitude and apparently her eyesight. She has been very focused & well behaved, having only been on it for about 10 days I am very impressed with results. Our DIVA is now a polite princess. THANK YOU!!!