parvo?!?!?!?

Question
We have a homeless pup about 4 months old that the entire apartment complex feeds and loves but he belongs to no one and roams the neighborhood as he wishes. He has recently lost his luster and stopped barking at everything that moves. He has developed the runs and has been vomiting. I can't get him to eat, even homemade yummies. But he can hold down water. He's been laying around my place just not like himself at all. I figure he's been poisoned or contracted parvo and have tried to figure out what one it was but they both have the same signs. I DON'T THINK he's had any shots or anything.1) IS THERE A NATURAL CURE THAT i CAN WHIP UP TO HELP HIM GET OVER THIS? I am handy with herbs and know what I'm doing. 2) This one is real important to me...I HAVE A MALE WOLF AND A FEMALE PITBULL AND THEY HAVE BOTH BEEN PLAYING WITH THIS SICK PUP THEY BOTH HAVE HAD THEIR SHOTS BUT ARE A BIT LATE ON THEIR BOOSTERS ARE THEY AT RISK FOR CATCHING PARVO IF THAT IS WHAT THE PUP HAS??? IS THERE ANYTHING I CAN DO TO STOP CONTAMINATION??? 3)THE NEIGHBOR DOG JUST HAD PUPS 3 DAYS AGO ARE THEY AT RISK IF THE SICK PUP WAS IN THE HOME OFTEN AND PLAYED WITH THE MOTHER DOG WHO HAS HAD HER SHOTS???

Answer
Chances are this pup has never been vaccinated if he belongs to no one, and I would say its extremely likely that he does have parvo.  If he does have parvo, the only thing that is going to save him is hospitalization.  One of the key things to saving a dog from parvo is hydration - and they generally lose fluids so fast through vomiting and diarrhea that there is absolutely no way you could ever get him to drink enough.  He would need intravenous fluids to help with that.  The other important thing is to keep him from vomiting, which is partly accomplished by not feeding him or giving him any water.  Since the body needs nourishment and fluids since it is sick, the only way to accomplish that is also through IV fluids.  If this puppy truly does have parvo, then your dogs are at risk if they are past due on their vaccines, and the neighbor's dog and especially puppies are at risk (if the mother has been vaccinated, the puppies may be partially protected by her antibodies).  Parvo is extremely hard to kill, and can live in the ground for up to a year.  The puppy needs to be seen by a vet ASAP, as do your dogs for their vaccines.  Keep them separate, and anything the puppy has touched should be cleaned with diluted bleach.

Amanda