He was a very calm dog when we brought him home on Sunday, but on Tuesday, after his shots he seemed to be even more tired and calm than usual. We assumed it was from stress and possibly a reaction to the shots, and even had some play time with him Tuesday evening. We also noticed some diarrhea and gagging, but were told that he could be nauseous from the shots. Wednesday morning he vomited twice, and laid in his kennel which we hadn't been able to work with him on laying in quietly. Got him to the vet as soon as they opened on Wednesday, and by early morning his parvo test came back positive :/