Nice and sharp especially around the eyes, where it matters. You must have been very close to fill the frame like that. Suggestions – maybe a little fill flash to bring up the fur colour with the backlighting, although not sure if this is OK on wildlife.
Shoot it quick with a gun not a feckin camera, if you don’t have a gun handy turn up the external flash to full power and fry the little bast**d, then jump on his head to be sure :twisted: :twisted: :evil:
They are an alien species from America wiping out our beautiful native red squirrell, seriously hate the sight of them greys. As for the photo, i think you underexposed the alien rodent, a bit of exposure compensation would have sorted it.