<human>: Give me the gist of the text in a nutshell

*Backstory:* When I was a kid (~12 years old) my mom got us a Shih Tzu puppy without any of us knowing anything about dog training. We  housetrained her, taught her to sit, but other than that she's fairly untrained. We never took her to any dog parks or anything, so she never really learned how to be around other dogs either. She barks like crazy when they pass our house, though.

She's around 5 years old now, and we're moving to New York to get a bigger house out in the country. I figured, we're moving to a place with tons of land around it, why not get a *big* dog this time? So I did my research, and I think I want to get a Labrador Retriever. My mom agreed to get a second dog, but told me this horror story of how her friend's labrador accidentally killed her chuihahua.

Now I really want a second dog, but I really *really* don't want any accidental shih-tzu deaths on my conscience. If we get the labrador as a puppy, and slowly introduce the dogs to eachother, can they grow up without being enemies? Are there any guidelines on how to do this? I would really appreciate it.
<bot>: Advice on introducing a new dog (preferably a Labrador Retriever) to a 5-year old, barely trained, antisocial Shih Tzu?