First one looks more focussed on the nose than the eyes. Generally speaking, when taking animal/people shots, focus on the eyes. The second shot does look out of focus too but I can't see any 'in focus' point so with my rudimentary knowledge, I can't decide between out-of-focus or motion-blur (but looking at the exif data, shutter-speed/focal length look good enough to avoid camera-motion blur). Assuming that you are not manually focussing, is it possible that you're locking the focus by half supressing the shutter button too soon before taking the shot so that when you take the shot, things have moved out of focus?
Edit - Addition: I've just had a thought - if you are manual focussing, it might be worth checking that the dioptre adjuster on the viewfinder (the little dial to the top-right of the viewfinder) is correctly adjusted for your shooting eye - the display in the viewfinder (shutter speed, aperture etc.) should be sharp when you look through it.