Tick- nice start! The only thing I can say is that you can add a ring or two of edge loops around the mouth. That would help a bit. All else is great! And, also, you have a 5-sided poly right under and behind the nose. A few more cuts will get rid of it.

nice work and keep it up!

Ashley-You kno you can download the free dog tut, its, well, free.
And, to enter the challenge you need to create a new thread called Jan/Feb-(noob or norm)-(your name).