What a beautiful story.  Alida Knobloch is a three year old girl who suffers from Neuroendocrine Hyperplasia of Infancy (NEHI).  NEHI is an Interstitial Lung Disease that causes fast breathing in babies.  This requires little Alida to carry oxygon at all times.  How is a small girl supposed to do that?  With the help of her dog, Mr. Gibbs.  Check out this video of Alida and Mr. Gibbs on the Today show in March.