Here's a more descriptive article.

I'm really not sure what to think about this one. On one hand, it sounds like the dog was suffering and should have been PTS. On the other hand, it sounds like the dog didn't suffer as frequently once she was rehomed. It's kind of hard to tell where I stand just from this article.

We did something similar when I worked at a vet - though the owners wanted to put their dog down because she was covered in Mange. Needless to say we found a rescue to take her instead of euthanizing her.