I want to add my
to NOT vaccinate your other adult cats against FeLV. It's not a 100% vaccine.. and from what I've heard form vets I have talked to it's really not always safe or effective and there have been cases of cats actually contracting the disease from the vaccine. If your other cats are healthy, just do what you can to reduce the risk. Wash your hands after you play with the other kittens.. no sharing of litter boxes, bedding etc.. easy common sense stuff.
If the kittens start becoming sick and are sneezing alot then you probably don't want to dwell.. when they are spewing snot and boogies all over the place they can easily shed quite alot of the virus and get it in the environment... that can spell bad news for the other kitties.
Just do what feels right. Don't be heartbroken if they don't make it as you've clearly tried what you could do
