I think that number one is almost there. A bit underexposed and the left ear/frame right is cut off. Number three I love but its a bit underexposed again. I know most people say get down to the dogs level but this works for me because of the good natured expression in the dogs face and the lovely green foliage background. Number two the exposure is better just needs a bit of fill for the dark side of his face. A reflector would have worked nice there. The fourth is cute but more of a snapshot with the dog cut off. If you can boost the exposure a bit in the third I think you will be very pleased.