Is it true that smaller dogs don't live very long? My friend was just yelling at me about my Daisy, she said why would you get a dog that small and it's not even going to live for 2 years! I almost cried, I hope my Daisy lives longer than that!

She insists that the Yorkie has the smallest life-span, and she said since Daisy is so tiny she probably won't even live as long as the regular life-span! She has a small dog to a shizu (spelling?) but she says that her dog has a longer life-span. I'm doubting this, since she not a really good friend, and I just think she wants me to feel awful about getting a Yorkie, which she has acomplished! But I just wanted to make sure, so will you please help me?