Thank you all for your replies!! I just love her so much like she were my child! Odd, isn't it?
As for her being little, she is almost 4 months and is STILL that tiny. I know that our neighbor's maltese is about 3 weeks older and is 3 times her size. Could she possibly be a miniature maltese or something like that? Her brother was taken in by my friend's aunt and is about the same size, maybe a tad bit bigger.