Poor boy!
This could get into a HUGE discussion about the pros/cons of vaccinations. And I haven't researched it enough to comment on that, but I would suggest maybe trying some rescue remedy before his next trip, I bought some specifically for Kylie for her vet trips and her baths. And I also bought thru www.valleyvet.com
pro calm. It is for dogs and cats. I just got it yesterday and haven't had a chance to see if it helps. Kylie doesn't have to go to the vet until 7-3-03.