My 15 year old cat had shots in December and now has been diagnosed with injection site sarcoma. My vet won't operate--he said, in fact, "I wouldn't blame you if you put her to sleep today." That was several weeks ago and she seems fine--in fact, eating more than usual since we are so glad she is eating we keep opening cans for her. The only sad thing is none of the other cats sleep with her anymore. How long do we have with her? She is a semi-feral cat and we have opted not to take her to a specialist because it is so traumatic for her to leave the house. I am so sad, I feel like I did this to her. We have 8 cats and have always kept up with their shots. We had 10 but one died of a heart disorder and another of cancer at age 11. Otherwise all are age 14 and up and I know we are going to be saying good bye to them in the coming years but this one is so sad because I can't comfort her.