Preparing your dog for the arrival of a new baby

It'll take time and patience.
Never leave the dog alone with the baby.
Never let a dog near the face of a crying baby. It could be the sweetest dog ever but their natural instinct to stop a crying baby or puppy is to lightly snap at it's face. A light snap from a dog can still do major damage.

Not trying to scare you. Some dogs will never ever do it but you never know.