One really cant "see" the image in the tread - great to open it up in Photoshop though.
I played with it a bit - and for me the issues are:
1.Image not sharp on the squirrel
2.Squirrel should be lighter
Remember the eye follows to where the image is bright - by making the squirrel lighter - and perhaps the bark either darker or less saturated (my preference), the focus is on the squirrel and the eye is drawn there. I actually like the image and think it should look great printed big - my version not yours
Note - if you dont like it - you are welcome to say and I will delete it. It is my subjective view only and I don't expect others to agree.
Like Andrea - my first thing would have been to crop - but it really does work uncropped.I think I crop too much anyway