What exactly does he do... or not do?
I only ask because we have a lesson horse whom the kids think needs to be more active over fences, when really he has a great cadence, knows his job and the more advance riders are able to extend and collect him to make the lines. He does require light tune-ups by an advance rider on transitions to keep him sharp and responsive. He is a slow mo, and an OTTB, but well educated and maintained, so we don't have issues.
Or is he more just dead... like if you take your leg off he will stop?
If your horse says no, you either asked the wrong question or asked the question wrong
And God took a handful of southerly wind, blew His breath over it and created the horse