Well Jon ... person ally I do not think this is the hottest subject on planet earth , that might be down to the rats massive appearance in parts of the world where we do not really like them .
So trying to look at it as neutral as possible ...
I do like the image design with the curved tree stump and the subject seems to peek over it ...
Nice structure in the stump following the curved outline ... subject is sweet with nice. details . Eyes do look very good
Tones are solid good ... overall kind of realistic flat , personally I would burn the stump , the subject .... but lighten the BG .
Color wise ... well there is a lot of cyan/ green in the fur .... that I would address .
A touch more NR to the BG would not hurt ... noise quite obvious in the monotony of it .
TFS Andreas