Going to share my experience with you. My youngest is 10 out of four children. There has not been anyone around Bells younger than six. So one day my cousin needs a babysitter I told her I could. This child was only a month old. He cried about the whole time and Bells just didnt like it at all. Bells will be one in December. When he cried, she barked and barked. After awhile I let her out and watched her very closely. She wanted to smell and lick him. She jumps up on furniture alot especially the couch to look out the window and that was my fear her jumping right on him or trying to get in my arms. She got to where she would lay on the back of the couch with her head on my shoulder. I think if you give it time everybody will get use to one another just watch closely try to include the pup when you are sitting with the baby. Good luck and congrats.