Has anyone's dog had a bad reaction to the Parvo vaccine? My Truman (4 months old) went in for the vaccine this morning (I only have single injections given, no boosters, just in case there's a reaction you'll know which vaccine caused it), and he threw up four times afterwards within the next hour at the vet's office. He had the Distemper vaccine about 4 weeks ago and did not have a reaction. Of course the vet didn't think the vaccine caused him to be sick (she thought it was the car ride to the vet's office) - I kind of disagree - I don't think it's a coincidence. He didn't show any other signs of being sick, but the throwing up concerned me. They kept him there for another hour and then gave him an injection of Benadryl, which seemed to help. She also prescribed Pepcid AC. My breeder is concerned that he had a reaction, but was relieved to hear he's now doing better.

Has this happened to anyone else, and what have you done to prevent reactions in the future?