George, some Rescue organizations move faster than others. I don't have a clue who covers NC, but if you see an RR on Craigs List or any community board, you should try to get in touch with somebody in rescue and let them take it from there. I can't remember what the NC requirement is, but if it is like Virginia you better have a valid three year rabies tag or you are looking at a huge fine and if your dog bites somebody then chances are it will be euthanized, no questions asked. Even with a valid tag, you have to keep your dog confined for three weeks and then report back to the Health Authority that the dog is not showing rabid signs. I know because it happened to me several years back. If the dog comes from near the coast, chances are it has heartworm if it hasn't been receiving profilactics. I know some areas you can stop giving them for several months in the year, but not near the coast or in the lower areas.
If you are worried about this dog and the NC person hasn't gotten in touch with you I can give you the name of the lady who overseas Maryland and Virginia and they are very much on the ball.
Fostering is difficult because you never really know the dog's true history and you could end up by being blindsided. Certainly a lot easier to get a puppy from a reputable breeder, but often if you contact a breeder they will know of an older dog that has been returned and needs to be rehomed and might be a better playmate for Dex.
Just a thought, you've been in touch with Susan, why not give her a call and tell her about this dog. She might be able to help.
Caroline