Your dog is a baby herself - she needs an abortion, plain and simple. You cannot ascribe anthropomorphic or human emotions to a dog. Ethics yes but canine ethics. Your dog will be healthier (and you may save her life!!) if she has an abortion. As a physician, I chair an ethics committee where we deal with some horrendous decisions - usually end of life or beginning of life and they are not easy. These ar humans with all the complications that families and individuals have.
Dogs think differently than we do and physiologically, their bodies are ,much different. Your dog really really needs an abortion - not puppies when she is so young herself and a small dog on top of all of that. You will doing her a medical, ethical and loving favour if you abort those fetuses as fast as possible before there are problems. I am sure you love your dog - please help her!!!!!
"There are two means of refuge from the miseries of life: music and cats" Albert Schweitzer