I agree with l1tech,
Anyone who would do that to any animal should be shot.
The only thing is that we don't know how the dog got there. Was he abandonded or did he run away and get lost. That does happen, and some dogs just don't have the sense of smell or ability to find their way back home and for a blind dog, that would probably be impossible.
It's great that someone saw the dog and reported it to the proper people who came to rescue the dog.
Yes, it was a bit of a Tear-Jerker for me. I have two dogs and one just got out of the Vet's Hospital with a bill for over $900. She is about 14-15 years old, and is starting to have some heart and kidney problems, but she is family to me.
...Rich