Yeah,
That looks good, there seems something wrong with the front legs, but the geometry looks OK, maybe the lower knee area is back to far and need to be a little more upright.
Ignore the earlier tri comment. You will always end up with tris on you models, esp. organic, just keep it to a minimum. 
Other than that great start.
Chris (formerly R@nSiD)
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Winner SM VFX Challenge 1

3rd Place SM SteamPunk Challenge (May 2007)