>I think the issue some have with this is
if you replace the world "child" with the word "horse" the AERC does have
concern with young horses but not young children.
Not even a comparison here, from what I can
see. The horse not only undergoes concussive forces and exertion that the
child on board does not, but also, the horse has no concern about the psychology
of achievement and does not suffer the put-down of being told he is too young,
and can't go do what the rest of his family is doing because of it. I
can't think of any damaging aspect to the young horse of being "told" he is too
young and not being able to participate, but putting barriers in the way of a
developing child can be devastating to some children.