Hi Anne
Welcome to COL. We are fairly new too. We are the proud owners of 12 week old brothers - the black one called Casper looks just like Millie. ( I'm still waiting for my son to show me how to post photos!) His brother is gold and called Reuben.
We have also been told getting brothers was a bad idea and gold dogs have a viscious streak!
We'll just have to work hard with them and hope for the best.
Good luck with your puppies.
Rhona