This page contains the following solutions.
I have never had a problem introducing a new pet, because I have always used the following method. This is whether I am introducing a new kitten or a new puppy to my established pets.
Introducing Your Dog to New People
Protecting Window Sills from Pet Scratches
Feeding and Caring for Pet Ladybugs
Tips for Introducing Cats
Introducing a Rescued Dog to Resident Pets?
Resident Cat Aggressive Toward New Cat?