I use magnetic boots on Lucy in the stable overnight in winter or any time she is standing in for more than an hour or so. She has spavin in her hocks, fully treated and fused but I use the boots to help stimulate blood flow and reduce stiffness. She is also on superflex and oil daily, has monthly physio and a weekly massage, but this management has her happy and passed by the vet as sound fir fast paced hacking, jumping up to 90cm as long as surface good. I also yae then after jumping or xc to help stiffness and reduce any pyffiness in her hocks. I find mine really good.