I have 3 cats and 15 days ago I took in a stray kitten. I have kept him separated in a different room with no contact with my other cats. He has not shared any food, water, litter, etc. Today I was able to have him tested at our local shelter for FIV and leukemia. His test came back negative for both. The shelter told me I was safe to introduce him into the rest of the household cats. I was told that the kitten is old enough that the results are extremely accurate. It is estimated that the cat is about 10-12 weeks old. However, through reading of my own, I have heard that you should wait two more months for a second test to confirm that the cat is negative. Do I have to keep this cat separated for two more months? How accurate is this negative test in a cat of this approximate age? I appreciate any help you can offer. I don't want to jeapordize my original 3 cats' health, but I also don't want to isolate the new cat for two more months if it isn't neccessary. Thank you.