Hello Elaine!
We @ Castaways Animal Rescue don't discriminate against FIV but we do tend to suggest they are rehomed as single cats and are kept within a localised area!
We suggest this not just to 'protect' other cats from becoming FIV but because of the weakened immune system in FIV positives any little bug could have horrendous effects! My Tribe have chlamydia and often have outbreaks and although it is easliy treatable in healthy cats it could be disasterous in an FIV positive case!
Also many of those we rescue (unlike other centres) are from feral colonies and some Toms in particular, even after having the snip do continue to fight for territory and mates, it really depends if you can get them young enough... So intergrating them into an established household colony can be heartbreaking for all those concerned....
The thread was beautifully written and gratefully recieved and yep
SPEY & NEUTER is a message we never seem to get across!!