He's obviously border collie, or at least partly thereof...........OF COURSE he wants to play!
Nice shot, since they rarely hold still for even a second.
Onlly suggestion I have is to brighten the eyes a little bit, and maybe "pop" the black to give a little deeper color (though that may just be the monitor I am using).
Joe is a stray that showed up at our house - we've got 275 acres, so he loves to run with us on the 4-wheeler to check cows. He's got a great personality!
This was taken with my 20D and the kit lens (18-55) that I throw on the camera when I'm outside working and don't want to risk one of my L's getting hurt!
Genes Home - thanks for the comments on improving...I'll admit being very weak on PS and this one has had nothing done to it besides downsizing for the web. I'll see what i can do with it. It looks great in an 11 x 17 print already, but I bet a touch here or there with PS can improve it even more!!