It is not uncommon for people to bring home a second dog, and often do not know how to help facilitate a positive introduction. This video does an excellent of of demonstrating how to do that in a neutral place. It also talks about acclimating a newly adopted pet upon your first arrival home.

Recognizing Dog Stress Signals Decreases Bite Risk
Understanding and responding to your dog’s body language and dog stress signals is a very important piece of keeping everyone