I agreed to foster three kittens from a shelter about twelve years ago who were only about 3 weeks old. Their mother had died and that's all the information I had. They all had colds and we had a hard time pulling them through that. Roo was the runt, had terrible digestive problems as though he was born before it was all fully functional, and was obviously weaker than the other two. I decided early on to adopt them out myself rather than take them back to the shelter. Roo tested positive to FeLV at 6 weeks, Sesat and Ted tested negative. Roo was isolated in my bedroom and the other two stayed isolated in their own bedroom. At 8 weeks, and at regular intervals after that, both Roo and Sesat tested positive. Ted has always been negative. I lost Roo at 8 months, Sesat at 7 years. Even though Ted is negative, he's always had a variety of health problems and I've wondered if this was because his mother had feline leukemia while she carried them.

So, yes, even those kittens who test negative eventually should go to new owners who know the mother died of leukemia. Like others, I believe they should know there could be health issues. I hope most sincerely that at least most of your kittens test negative.