Thanks Pebblesmama! I'm definitely going to talk to my vet but I'm thinking that his reasoning will be similar to your vet's. We are in the same type of environment and he is a very experienced vet of both small and large animals. But if he tells me the same thing yours did, I will feel better knowing that it's more or less a "second opinion" I'm getting.
As for the other shot you talked about, I think you're talking about the Corona vaccine. Kim posted a good link about that. Here it is...
http://www.petresource.com/articleso.../texasvet.html
I'm gonna ask about that one too - I think it was one listed on the reminder notice I got.