I have six horses; an 18 yr old OTTB, a 17 yr old Selle Francais, a 16 yr old Holsteinor, a 14 yr old Hannoverian, a 16 yr old Appendix QH, and a 12 yr old Hannoverian. They were all either given to me or I paid very little, as all were lame and unrideable. They are all doing great, are sound, rideable, and quiet. They all responded to the mag supplement; I noticed softer backs and lower heads. The OTTB was absolutely dramatic. He is an insecure horse and often paces in the pasture calling his friends, and fusses in the cross ties. He responded to the 10 mg nightly scoop of mag. When I added a morning scoop, within two days he was so quiet I took his temperature. For the first time ever, I had to go get him in the pasture. Even in the dark, and when he was the only horse out. This would have previously had him calling and running. It is pretty crazy. I have since experimented by withholding that morning dose and he is always obviously more restless. If I didn’t see it with my own eyes I would not have believed it.