epends how thick the skin is. If it breathes fire, I imagine its
   eyes would have some extra thickness to protect them from the
   heat.   Then again, water naturally siphons off heat. So, maybe
   dragons cry a lot to keep the heat from bothering their eyes. If
   that's the case, they might be penetrable with bullets. But I'd
   still try to communicate with it first: it'd be my first alien
   species.