[Marilize]

The best way to introduce them is to take them for a walk. A good long walk to tire them out. When they are tired, simply walk them into the house.

Walking together is something that dogs only do with their friends and family, so by walking them together, they will more easily accept each other.

Also, tired dogs are happy dogs, so you are guaranteed that there won't be any weird vibes. They won't have the energy for issues!

Good luck and congratulations with your new baby!