Thanks to each of you who responded so far to my query re: feline annual vaccinations and the possibility of related feline cancers. I was happy to see that I am not the only cat owner who is concerned about this health issue! Since I sent my post, I have been reading more information and one thing I would like to pass on to other readers is this: it is unclear how long the protection from annual shots lasts; some sources I read say it could be as long at three years, which means that the yearly thing is not necessary should this prove to be true. I think the idea of giving the shots at different places on the body is a good one and I plan to discuss this with my vet. I still have not made up my mind whether or not I will give the shots on an yearly basis, however. Thanks once again for your input; it was appreciated...regards from Deborah in Montreal