I've not been too impressed with the focusing ability of the AFDIII, and looked into it a bit more now that I've got time and it appears I have a body that front focuses (kind of ruled out the lenses).
I tested the camera with a football and my dog, white dog, black eyes, white distressed football on grass. I repeated this numerous times, my boy tends to pose quite nicely.
Exhibit a: Focus point on the dogs head (red line is where the sharpest focus is).
Then, on the football:
Then onto a static tuft of grass:
Is this something to do with the gap between the back and the body? Or something more?