OMG! I can't believe you guys are telling her to basically go steal this dog. If she is that worried then YES call the authorities but DO NOT STEAL THIS DOG.
I personally leave both my babies outside at times and they love it. If someone came and stole my dog for the simple fact that they were outside alone I would be PIZZED. I take care of my dogs and I love my dogs very much, but yes they do go outside in a fenced yard alone.
EXAMPLE: You could very easily be in a two story house behind me looking out your bedroom window and see my dogs outside and think they are abused because I live in Houston and it is hot and humid.
You can not take things into your own hands like that. That is completely wrong. If you think this puppy is in that much of danger then call the authorities. They can come investigate.