I go with Bob, it looks great and nice and sharp as well.
Although not a problem here, one other thing to bear in mind as well as the animal having "nose room" always ensure you focus on the eyes. If the eyes are out the image just won't look right.
If you want to edit any of my images to demonstrate points/techniques to either myself or others please feel free to do so.
Still learning with Canon 40D, 28-135mm, 100-400mm L and Elements 6.
Any Advice greatfully received.