These are very nice.
If you don't mind, I'm going to call on Mr. Goblin to join the ranks of DC default small pics.
What would be really sweet, is if at some point in the future, you did a rat picture with a *whole bunch* of rats.
And, it would be cool to see a picture of a giant rat coming out of a crack/hole in a dungeon wall. (You could even put most of the rat in deep shadow so that he would be very easy to draw (in relation that is).)