I was sure that I wasn't the only one to have done this although the general position seems to be to keep FeLV+ cats separated from FeLV- cats. Part I was the research and medical prep work. Both indoor cats were tested and then vaccinated.
I really wish people were more like you and would research whether FeLV+ and FeLV- cats can live together without being separated.
The feral garage cat was tested and put on a regime of Lysine/ interferon/ herbal meds to boost his immune system. All of the cats, especially the feral, we're deemed psychologically well suited as they are 3+ years old and VERY nonagressive.
Sadly, we didn't do anything special with Smokey as far as boosting his immune system because at the time, Smokey was being fostered because my then husband was worried that Smokey would make our other cats sick. Once we found out that we could vaccinate our other cats, and after it was done, Smokey was allowed to come back home. I wish we had known about boosting his immune system, though the last lady who fostered him had been feeding him kitten food, with the belief that kitten food contained extra nutrients and could help boost his immune system. We kept feeding him kitten food, but my then husband complained about having to buy different food for Smokey and he stopped buying it. But the last lady to foster Smokey for me wasn't the only one to foster him. He was fostered by two other women. I don't know what the first woman fed him, but he lived with her in her dorm room. The second lady had cats of her own and couldn't/wouldn't let Smokey stay in her house. She kept him in a cage in her barn. (The resulting issues that Smokey had are for another post.)
Thanks for the words of encouragement, we remain somewhat concerned as to whether we are doing the " right" thing.
I know what you mean. For the longest, after Smokey passed, I was worried about my other cats contracting FIV/FeLV even though they were vaccinated for FeLV, especially Star. All I can recommend is that you have your other cats tested every so often. Since they are older, their resistance should be built up enough so that they'll remain FeLV-. Good luck to you, lyle. Keep us posted on Joker's progress.