I am not noticed any type of Stringhalt in the horses I've gotton off the track. The closest to that I have had was stiffness in one hind leg, but that went away went I moved them from their 12X12 racebarn stall into their 12x24 outside pen. Once they were able to move around more in the larger stall, that stiffness went away! Do you feed yours anytype of supplaments???