Hi Marc you were very lucky and top marks for making the most of this rare opportunity.
The head resting on the other one is very endearing, especially as you have a good, low POV with the face looking directly into camera, engaging with the viewer. However, and you knew I would have a thought, LOL:D, I just find the vegetation either side a little distracting, therefore I might suggest a vertical crop using the full height of the image and placing the head central within frame. You get the environment of the den framing it top & bottom, but it cuts away the distracting vegetation to me and retains that engaging look. Either way, nicely done and the colour/detail looks good to me.
TFS
Steve ;)