I just bought a new puppy (toy poodle,male, 2 months)on sunday, on monday he was OK, on tuesday he started having a runny nose. On wednesday he had diarrhea and i brought him to the vet. Vet says probably is worms and gave him worm medicine.Vet also gave me antibiotic, diarrhea medicine, multivitamins, and glucose. He also didn't eat so vet gave him some glucose which he vomited once we came home. Thursday he was very weak so I syringe him some glucose and medicine. He was ok after that and played a bit. He didn't eat much and still had loose stools. Today is friday and he is very weak. I syringe him glucose and he still has diarrhea. What's wrong with him?? It has been nearly 4 days alr. pls, any advise?? thanks.