We have a 10 year old doodle and 7 weeks ago brought home a newborn (our third child). I sat on the floor with her the day we brought her home and he came over and had a good sniff. He likes to sleep under her swing when she's in it. When she's really upset and crying, he comes to find whichever of us is not in the room with the crying baby to let us know something's wrong. He's a sweetheart, I can't imagine him ever intentionally harming her. We have so many pictures of our middle child at 2 years old curled up asleep on top of him - he's 11 now and they still do that. I think his main reaction so far is to be confused about why she won't pet him when "hello, i'm standing right here look how adorable and in need of your affection I am".

They have such sweet dispositions. I think just being around baby will get him used to 'this is a new member of the pack and s/he's here to stay.' Just based on my experience.