Introducing a Second GOLDENDOODLE into our Pack--Need Tips!

[Gabby]

Hi Everyone!  We  have a beautiful F1B Goldendoodle that is now 4 years old..  We have been talking about adding a second fur baby to our pack and are now on a litter that is due to come home in May.  I'm super nervous about introducing a puppy into what is now a very easy, and peaceful situation.  Our DUKE is fabulous--easy-going, excellent with everyone he meets including our 3 kids, and a fun dog to take with us on our camping trips, etc....  The idea of another doodle sounds like so much fun only because I LOVE this breed--they are so smart, fun to train--as they are eager to learn, and just as sweet as pie...  BUT, somehow, I'm feeling a bit hesitant only because I don't want to disrupt our harmonious pack.....  For those of you that added a new dog, how did it go?  Any tips would be amazing!!!!  I want this to be as smooth of a transition as possible.... THANK YOU!!!