Not quite where I thought you'd end up as this was one of my top picks for the challenge. I really hope you can do something with this photo (without the text of course). I imagine this really would sell well as a stock photo (high or low end).
Camera Work/Technical: I like your choice of apertures here to create a great depth of field. Your focal point is on the perfect area of the image, and you did a nice job isolating your subject.
Lighting: Also very nice. Everything is nicely and evenly lit. Your lighting also helps isolate the subject, with the background being just a touch darker.
Composition/Content: While I'm no stickler on the 'rules' of photography, I think your subject is a bit too centered for this capture. I am also not a big fan the text you chose.
My Opinion: Nice work meeting the challenge, and a pretty well-done image. A little too centered, but still pretty strong.
Thank you for the opportunity to provide a critique on your entry,
Eric
Wow, the expression on the dog's face is just perfect! You expect him to open his mouth and start singing the blues in a voice any minute now...
While the facial expression and the blurred colour background work very well together, I think the picture would be much better if the entirety of the dog was sharply in focus (or at least more of it anyway). Dunno if the shutter speed or the DOF is to blame (probably the latter?), but it'd be something I'd change.
There's a poster in here somewhere. :D One of my top picks. Wonderful job of controlling DOF to keep the nose and "face" sharp while nicely blurring out the bg. Good luck in the challenge.