because of the way it is made.  It is made exclusively for cats, which is
why it is safer - where the two/three year vx is for cats or dogs.

My cats get that too. My vet says it is just because they don't *really*
know how long a vaccine is good for and purevax is new enough there have not
been studies. It's basically a CYA measure by the pharmaceuticals. Because
my one girl has reactions even to the new vacs and is totally indoors, I do
not do it yearly. I really wish that whoever produces the vaccine could do
something about that one year recommendation.