On the other claw, I think the poor dragon would end up donating scales, blood, fangs and other dragony fluids to Severus’ ongoing potion needs. Either that, or he’d give the dragon to Harry as a present and delight in whatever chaos ensued. :D
*giggles* Now I wanna read that fic! I can just see Severus smirking as Harry flees from the dragon's flames. :D