I like the inquisitive/alert pose and the vertical comp with the large branch descending at a diagonal. The colors on these squirrels are pretty amazing. Well done.
A lovely animal, beautifully displayed. F/8 could have been a better cal on DOF, especially on the hands. I slight contrast boost will enhance the visual impact in my books, but as often stated, I prefer contrasty rather than clear photographs.
I love the colour combination and these squirrels are just so photogenic (well, you can take credit for that too). What's the shutter speed? That Tree makes a nice compositional element again.
In this case not sure if selecting a focal point further back would have been an alternative to more DOF, although the latter might have been the way to go if it was skipping around.