Alright, so I've personally been fostering for about a year and a half now - the rescue that I foster with actually would prefer for me to leave my foster cats completely separate from my current cats due to any sickness that could possibly be spread, if you do a proper quarantine time of 3 weeks then it'd be different (I guess) BUT by that time most of the cats are/should be adopted out. I made an exception this time around because I am currently fostering some semi-feral cats so I have them upstairs so they get used to me and all the everyday sounds of living, etc.
Honestly though it may sound really cruel to you to have them in a separate room away from your cats and just spending some one on one time with them in the morning and evening, but it isn't. You have to think of the alternative - atleast that's how I look at it. Most of the cats that I have fostered are cats that are outside and I KNOW even if they aren't getting 24/7 care and attention with me at my house it's much better than being outside 24/7. I give them a higher chance of being adopted and living a wonderful normal forever life than they'd get if they were born outside.
Plus I work fulltime and still spend quite a lot of time with them. <3 I took in a feral mom cat last April and she gave birth and it was my first batch of kittens officially born at my house & I had a very hard time saying goodbye and letting go of that family but man oh man was it worth it!!! I would do it again in a heartbeat.
Anyways - I just want to tell you to not feel bad if you end up keeping them separate, it doesn't make them any less loved. I think anyone and everyone who has some extra space should foster.
I don't like to bring my foster kitties upstairs most of the time, too, because I already have 6 cats and anytime we've foster failed my cat Sophie now has pretty much had enough.. she is totally telling me that. I feel bad and know that there is no way possible I'd be able to really bring another cat into the picture, and that's also why I've been kind of having a hard time with my semi-feral's upstairs as well.
They don't get into real "fights" but they totally have an attitude towards the newer cats, now, I hear more growling & hissing than I've ever heard before in my home. But then they snuggle together or atleast close by one another, so.... yeah!
Danielle & the seven meowzers.
Eechy, Boogeyman, Sophie, Ramona, Luigi, Sampson & Henry.