In my humble opinion it just would not be right to compound the crime by another crime. It would be a crime to keep or rehome this girls dog and then lie to her. You could probably get in mega trouble doing that! The dogs owner needs to be educated for sure but stealing her dog and lying to her about it is no way to educate her either. I would however give her fair warning after explaining to her that withholding food will lead to starvation of her pet but will not have the end result she is seeking. If she doesnt clean up her act then I would try to talk her into giving up the dog or face animal abuse charges! I would also make sure the poor little baby got as much food as she wanted to eat while in my care and would call your vet and explain what is going on not only for the babe's sake but so you will have additional documentation if needed to get the pup away from this situation. I am so sad for this puppy! I too would like to just whisk her away so please dont think I am being judgemental but 2 wrongs never make a right.