C&C per req:
He may be a cute dog, but we really can't see enough of him to tell. Start by getting farther back so that you can at least get his whole head in the shot; a head & shoulder view might be even better. Technically, it looks like missed focus and/or insufficient DoF in all three images. His ears and nose/muzzle is very soft and the area around his eyes appears to be almost in focus.
When shooting people or animals, try and get down to their eye-level so that you are shooting at them rather than down on them Animal eyes are much like glasses, they can reflect a lot, and there are distracting reflections in his eyes here. Get off to the side to that the light isn't directly behind you.
Just my $00.02 worth - your mileage may vary.
~John