A.G.
Most dogs need to be able to greet the new baby early. Then they learn he/she is here to stay and then they start to protect the young one. They can smell the baby's clothes, blankets, hair, hand or walk around as you walk around and let the interaction start between the dog and baby, with you in charge all the time. If you use soft tones and slow movement, the intro should go well. Let us know.
A.