1. Cute, but with a few minor issues. the white of her top is blown out, and you've positioned her in such a way that a tree is growing out of the back of her head. You do however have good exposure on the skin and dog. Try and avoid centering your subjects quite so much however.
2. Much nicer; this one works very well. I would suggest perhaps cropping most of the area image right off if possible since the bright areas in the background are a bit of an eye-grabber, but other than, and very minor highlight issues on her top, it's great capture.
3. Seems rather noisy. You've done well getting down to his (her?) eye level, but your DoF is too shallow and the nose/muzzle is very unfocused and the eyes (which should be the point of critical focus) are soft as well. Again, you have a very bright area in the background which is grabbing my eye.