cool subject. nice blur on the background. tuft of grass in foreground makes me feel like I need to move my head to see better... its a little too close to the subjects face.
8 - Great shot, great perspective. Good colors, detail and texture. Criticism; if the detail and focus on/in the rat, especially it's eyes/face/head, were as sharp as on the grass near it on the right, would have made this an even better shot in my opinion. Technically, while no 'expert', you appear to have applied the rule(s) strictly and well here and it enhances this shot even more in my opinion. Up to 8 from 7 after commenting.
HEE HEE - Great DOF. Love the little sparkly eyes. I have to up the score just for the cute facotr. If it weren't rule of thirds, I'd get rido of some of the murky green to the left.