The first time he got hurt, he actually was playing flyball. But it was an accident- he got run over by a huge dog. It wasn't the result of normal routine running. This time, he hurt himself falling off the dogwalk. It wasn't a bad fall, and he landed on his feet, but it was enough. Sigh. He's 3 1/2. It's a huge portion of his life that he's been on injured reserves. It sucks.