I just got my new puppy from the humane society 4 days ago and now he is sick!! He has a lack of appetite, vomiting and diarrhea. I took him to the vet the day after I got him and nothing was wrong... now it Sunday and I can't seam to reach anyone... HELP!! :confused:

He may have parvo. Try to keep him from becoming dehydrated. Is there an emergency vet clinic? Your pup may be dying.

Yes, take him to the vet, the sooner the better.

If there are no emergency services,try to keep him hydrated,give him water ,even if it is via a turkey baster.Try to get fluid in him.without making him uncomfortable.
Keep him cool.Don't cover him up or make him warmer.
Kind of leave him alone as much as you can ,let him rest until you can get help.