In the first picture, his eyes are yuck, and maybe I could do some retouching. I liked the angle he was looking at, and feel the pose he is in- curious but too lazy to be REALLY curious, really captures who he is.
In the second picture, you might have understood exactly why I selected that photograph- its gross. You have his gross little chin-hairs, his cold, snotty nose- it was basically a counterpoint to all cutesy dog pictures, revealing what many would try to look past.
The 3rd one was rushed, and taken a while back. If I had it to do all over again, I would have centered the fireplace in frame, got rid of the tools, and lit the black dog a bit more to keep him in the foreground- the lighter dog draws more attention than he does.