We have a 5 month old GSD and a two week old newborn. Can anyone offer some tips on how to ensure a harmonious upbringing for both? How should we let them get to know each other? What’s a good command for how to teach our pup to behave around the baby?
Congratulations on your baby!
I've had newborns and GSDs with, I think, great success. (The little humans are now almost 3 and 1).
I think the best thing we did was to get dogs from good breeders. Other than that, we spent a lot of time training. We took the dogs to a series of obedience classes when they were puppies and into their young adulthood. I think that helped to ensure that the dogs were used to lots of distractions, noises, and different kinds of people and dogs. We managed to do much of the training before the babies were born, knowing (or hoping) that a family was in our future.
I know it will be hard with a newborn, but I'd recommend investing in obedience classes with your puppy, more than one ideally. If you ever want to go on walks with your dog with a stroller or a toddler, having a solid heel and good manners in public will be essential. All the basic obedience commands will be useful: heel, come, stay, sit, down, leave it. Perhaps, a place command.
Also, crates and baby gates are your friends. There are times when babies and young puppies just don't mix. If things get too amped up, block off a room with a baby gate so the puppy can still see you, and let him cool down for a while.
Supervise supervise supervise. Did I say supervise?
I didn't do anything special to help my dogs get to know the baby. I wanted them to be on good behavior and even ignore the baby. I could tell you how I introduced the babies to them, but since your newborn is two weeks old, I'm assuming you've already done that.
How is your puppy with the baby? If you are having problems, and you can possible afford it, hiring a private trainer could make your life easier and give you peace of mind.