My 1 1/2 year old cat went to the vet for a teeth cleaning this morning after at her routine yearly exam it was discovered she had excessive tartar and plaque build up. A few minutes ago, the vet called to advise me to test for the feline leukemia virus as this may be a sign of the virus. Is this probable? What else may cause tartar buildup in such a young cat? She is playful, eats well, and no other signs of any diseases, does have some signs of crust around her nose though as if a runny nose. I have 3 other cats that are all 5 months older than her, and all indoor cats. Any advice? I'm going crazy waiting for the test results and her phone call!