I never give sugarbeet to our boys. Male goats do seem to be a bit more prone to getting stones, than tups for instance, and I know of several males that have died of this. We had one ourselves, who did recover from his stone (much to our very pessimistic vet's surprise), but he did eventually have to be put to sleep a few months later as he never got back to full strength after it.
So I would definitely avoid feeding it. That said, Reggie may be able to cope with it and be fine, but it is a slight risk.
Beth