Moses had his surgery when he was when he was 2 1/2 yrs old. And we have had no recurrences at all. I can't even see the scar. After that I do not give the Fe-leuk vaccine. But since I breed I do test the females in the house for it. I do not recommend it to the kitten buyers either. I had to have the one in 2000 cats that had a reaction to it. The vaccine was made by Fort Dogde and they all do about the same thing in making the vaccines. Moses will be 6 yrs old on August 1st. Good luck and keep us posted on how he is doing.

Stella