Joyce:
Bless you for having rescued a "special needs"
dog and considering adopting another one.
If you go to: www.ygrr.org , the Web page of Yankee Golden Retriever Rescue you can read stories about how quickly Goldens can accept a new member of the household, and you may also have some of your questions answered.
Also the American Dog Trainers Network at: http://www.canine.org
may give you answers on the best way to introduce the dogs to one another.
I hope everything works well for you and the pups. Let us know how you and they are doing.
Carina, my Golden girl, and I send love and best wishes.