My cat Vinny has been OTJ since May 2009 -- we are thrilled. I monitor his levels weekly and they are between 70 - 110. He is due next month for his Rabies and FVRCP vaccines (we discontinued the Feline Leukemina shot quite a few years ago since he has no interaction with other cats). He is 14 years old. My concern is that the annual vaccines he is due for are going to throw off his sugar levels. My vet said the shots should not affect his sugar levels. Has anyone experienced any issue with shots causing sugar levels to fluctuate?