Pixie... I too was going to mention that she was born this way, which to me makes a big difference... this is all she's ever known. I've seen her before and give kudos to the family for their dedication for her health. I feel if she had been an older dog who lost her front legs it would have been another story.
Here's her Dogster page: www.dogster.com/pet_page.php?i=274434. What an incredible dog!