I think he may have stuck to the table/or paper durring surgery. Is it right on a pressure spot, like where if he were to roll over, all his weight would be on that spot? There's been some bad frog burns here, with Picts, that healed up in a month. So I would think, that it should heal quick. just watch for infection, if it looks dry/scabby it probly fine. If it grows, bleeds, pusses, or anything weird, a little neosporin. But it's been a few days, it's probably dry and clean, and in a good spot to keep clean.