My 1 y/o puppy chewed about a 1-1.5 foot section of the interior window sill. I'm wondering if I need to replace the window sill, can I do so without having to take the entire window/frame out or can I simply replace the sill without having to do so. Or would it be an option to take a router/sander to it and then re-paint it? Any help would be MOST welcome. I've attached a picture of it from two angles. The rest of the sill is in good shape, by the way.