I have a mare that I have had for a few years, that was very hot, spooky, and with very tight muscles. She is so difficult to ride that I pretty much gave up after several years of trying different methods to get her to relax. She was also somewhat like this on the ground as well. I put her on the 10 day trial of the MagRestore, just to see if it might help her. After 4 days I could start to see a difference in her, and I continued until the 10 days were up. I was able to start riding her again, and I only have her on a maintenance dose of 1 scoop now, but it was a huge difference in her in a short time. I had no expectations that it would work, in fact I had tried Quiessence in the past with minimal change. You can debate whether it works or not, but there is no placebo effect with horses, and it either works or it doesn't. After researching this a little more, the area I live in is very low in magnesium in the water and soil, and the supplement I feed doesn't have much either. I decided to put all 5 of mine on a maintenance dose, since they eat the same feed. The one mare had a big change in relaxation, one of my mules was much less pissy about brushing, 2 of them have more relaxed muscles, and one I didn't notice much change. As a group I notice less spooking and running in the pasture, they seem calmer and generally happier. And wet saddle blankets did nothing at all except amp my mare up. I would have thought something similar if I had not had a horse like this mare, but there really are horses out there that cannot be fixed that way. You can do a trial for <$20, if it works, great, if not, your horse was not deficient, keep looking. Your horse will tell you whether it works or not, not someone on a chat group.