Anyway, I was thinking about lunging him (he's known how to lunge since he was a year and a half, though I don't lunge very often at all... just every now and then) and setting up a small jump or two to lunge him over... nothing bit, about a foot/foot and a half/two feet.
My question, though, is that with him being just barely four, would it hurt him any to free jump him a few times? I have jumped him before... not much at all though. We ride on trails, and sometimes come across a foot high or so log across the trail or a ditch that we have to pop over. The trails that I know for certain have 'jumps' on them, I try to stay away from those trails with my boy until he grows up a little more, though.
So, what about it?