What It Means When A Horse Stops Tracking Up
Tracking up means the hind hoof steps into or past the print of the front hoof. When a horse stops tracking up, they are not flexing and reaching as far behind, often because the body does not feel able, or because the horse is not motivated to offer that effort.
It does not always mean injury, but it does mean change. Your horse is telling you that engagement is harder than it was before.