By 'cure' do you mean stop bleeding? Or heal over?Can I ask you how long took to cure it?
If the first, both had stopped before I spotted that he'd lost them (both times), so I'd say within the day, if not the hour.
If the second, it was difficult to spot the site of the loss by the end of a month. As you can see from the second photo, which was taken about 6 months later than the first, it's so completely healed that one wouldn't know there ever was a spur on the right leg. But they are both very obvious here, taken last year