I love the way the lion one above is coming out also…the new light and shade render you used is looking great also…but I have to agree with Teomaco about the feet…Needs the boney arch on top of the feet…high in the center, and slopeing down on ether side…starting at the ankle and ending where the toes start…feel the underlying bone structure on your own feet…Maybe even having his toe claws digging into the surface of the base a little…Will give more of a sense of weight on the base, and to him as a weighted object also…right now he appears to be without it, even with the shadows…maybe a little more compression where the feet parts and all of his weight come into contact with the base,…maybe on the base parts that come into contact with his feet also, like if he walked forward, he will have left a sunken in impression, a footprint made by a creature with alot of weight.:)…Just a couple of thoughts crossing my mind as i’m looking at, and really enjoying your work and piece that may be useful to you, don’t know, but thought them worth mentioning, just in case they may be. 
Keep Inspired, and Inspiring…