I don't think that's possible. The kittens can get it through the placenta and milk of their mom, not the sperm of their father. Unles they had close contact with their father but that's not very likely with stray kittens. Males often don't want anything to do with their off spring.
I have read A LOT about Felv on the internet lately. It's possible that the kittens who are negative have the virus, but it is hiding and not detectable. Some will always stay negative, some will turn positive at some point. Some will eliminate the virus completely and will never get sick. This disease is very complicated with more then 1 out come! 2010/12/11 Sharyl <cline...@yahoo.com> > Kittens can have have different fathers but the same mother. Perhaps the > father was positive. > Sharyl > > --- On Sat, 12/11/10, Marnie <marni...@embarqmail.com> wrote: > > > From: Marnie <marni...@embarqmail.com> > > Subject: [Felvtalk] Insight Please > > To: "firstname.lastname@example.org" <email@example.com> > > Date: Saturday, December 11, 2010, 12:52 AM > > My shelter just took in a litter of 5 > > kittens. They are about 8 weeks old. The 3 females tested > > possible for feline leukemia with the Idexx snap test and > > the 2 males were negative. We retested from another batch of > > tests and the same thing. How is this possible if they are > > all from the same mother? Can anyone shed some light on this > > please? > > Marnie > > > > Sent from my iPhone > > _______________________________________________ > > Felvtalk mailing list > > Felvtalk@felineleukemia.org > > http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org > > > > > > > _______________________________________________ > Felvtalk mailing list > Felvtalk@felineleukemia.org > http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org > _______________________________________________ Felvtalk mailing list Felvtalk@felineleukemia.org http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org