Thanks! I have to try this with Henry although I expect he will take a while to pick it up.I actually started very close to him, just far enough so he had to jump to me. Then I slowly started to back away. This was actually months ago. I mean closer to 6 months ago, and I actually took a break from it. I called him on a whim, and he actually came to me. I can't get over how incredibly smart he is. The credit really should go to him.