I am totally offended for you!!
How dare that woman say your baby looks like a rat!! I am from NYC and have seen the sewer rats in the subway station. Those are the most disgusting looking creatures on the face of the earth. Your pup is absolutely precious and that woman was way out of line. But I agree with most people on here. She was probably just jealous of your dog and called her a rat due to her size not look. Don't let anyone take your joy and ruin your day. In the end, you go home with a loving husband and precious little dog and she gets to go home and look at her "rat face" in the mirror!!
