So sorry that this happened to you and your little guy. I was once at a state park with my beagle/boxer mix dog taking her for a walk. My dog was leashed as the rules stated and would you believe that a little dog attacked my medium sized dog? My girl was attacked by a dachshund. That little beast came charging after my dog and put a nice puncture in my girl's ear. I was so pissed! The dude that had the dachshund was very apologetic and offered to pay for the damages that his dog caused. Guess I should consider myself lucky that the dude paid up.