Don't set the fox itself to Dodge.. Erase around the edges of the render or place the brushing on top of it and erase the brushing on the render to get it to blend in without having so much covering it up.. Also, if you still want the render to act like it's still in dodge mode, duplicate the render layer, blur to about.. eh.. 3ish..? then set that layer to Dodge..

Hope that helps..