Lucky The Two-Legged Dog (video)
 

He's not your average four-legged friend, but that's what makes Lucky the dog so special.

the video

Lucky for Lucky, when a car broke both his back legs five years ago, it happened right outside a pet hospital. Dr. Becky Wilkenson cared for Lucky when he came through her door.
When she couldn't find the dog's owner, Dr. Wilkenson had to make a tough decision. Because he had no hind legs, she just about decided to put Lucky to sleep. But an interesting twist kept her from giving up on him.
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the story

"Lucky's now the clinic mascot, helping other unlucky animals recover from surgery."

How does it do that?

They said if another dog or something was recovering from surgery and 'crying', that Lucky would lay down next to it.