I ride dressage, but I thought you eventers might know more about this question!
I ride my unshod cob (4 y/o) on hard dirt roads regularly. We don’t have an indoor, so when the fields are a wreck in the winter, we do a couple miles WTCing on the country roads, about 2-3 times per week.
Like I said, we really have no alternative in the winter to keep him at his fitness level, but I am curious as to what the effects of this could be. I’ve seen a lot of personal anecdotes, but I’m wondering if there’s any actual research on this or vet’s opinions.
A lot of what I’ve seen say that it probably wouldn’t be bad for soft tissue, but it’s bad for hard tissues (could harm foot bones, lead to arthritis, etc.).