I want to start out by saying that I think this is a crack-up and if it had been done just a little bit better would have been the perfect photo for this challenge. Quite ingenious, actually.
Some suggestions:
Lighting -- it appears that a flash was used (?), which led to the uneven lighting of the eagle in front and the muddy colors of the other animals around the periphery of the frame.
Focus -- the animals at the top of the heap show some signs of hand-shake of the camera when the photo was taken.
Framing -- for this challenge in particular, it would really help if the pile of animals alone was in the frame. Showing the claw and the ceiling at the top interrupt the effect of the animal pile.
This would work much better with a bit more overall lighting. Is harsh on the eagles and then the lighting gets muddy all the way around the edges. I think it may have worked better getting in a bit closer.