My Thoughts:
#1: Your focus is off, you focused on her nose, not her eyes.
#2: Too much going on in the background... it looks like glasses are growing out of her head. You also cut off part of her paw. Watch out for those things.
#5: You need more light on the dog, she is really dark here.
As for all of them... dogs don't look good in pop-up flash light. It turns their eyes green and creates harsh shadows behind them. Consider getting a flash you can use off camera. Or... for a quick fix get an index card and hold it at a 45 degree angle in front of your flash so that it will bounce the light off the ceiling (this works best if your ceiling is white).
Keep on rescuing dogs and keep on shooting!