I'm not one easily moved to tears by stories I read on the web, even when they DO touch me. That said, this one has made me weepy.
Don't let anyone make you second guess yourselves on the decision to place the dog BACK with the family. I know that "paying people's bills" isn't the function of a RESCUE, and that you don't want to set up a precedent for being expected to do so regularly...
...but this certainly sounds like a special case, and what incredible CHRISTMAS ANGELS you are being to a daddy, and daughter, and a dog. You must honestly seem like a miracle from God to them.
Please continue to keep us updated on this case, and the need associated. And we'll want pictures of the eventual reunion!