I saw that on the labrador rescue's forum a few weeks ago. It made me cry too. It was the words at the end that really set me off. Hope she found a lovely home.
Oh my, breaks your heart to hear that sound. Not sure why the vet needed to get her on a lead though, just had to sit down and wait for her to come to him. That's irrelevant really , good for those involved in giving her a chance.