Raising Two JRT's at the Same Time...

I have a wonderful and well behaved JRT and my husband and I have owned her for almost seven years now. The Question: I would really like to have another JRT for her to play with and I was wondering if this would be a good idea. Can you own two JRT dogs at the same time? If so, how would you go about introducing the two dogs, especially if the new JRT is a puppy?