Great set up! I love rats. We used to have three when I was a little girl, Ben, Pinky (mine), and I can't remember the other one. We had them as pets. They are amazing creatures. i am babbling.
I love the details. Nice little light sparkle in the eyes.
way to go capturing such a creepy shot with your 3 subjects. however, the shot could have benefitted from a bit more lighting, especially with the rat climbing the skull. it would have brought out more detail perhaps.