At 9 inches he's big enough for earthworms. Mine is 12-13+ range and will eat three easily. The 6-7 inch tire track will eat them and even the four inch will try, he just doesn't usually get one down before it's stolen.
More updates! It's kind of nice because I can track their growth. However some of the people on here (you know who you are) make me want to stop posting pics. Their shots and fish are just too nice! How can anyone else compare?