oh boy! i've been there and let me tell you, it's a challenge well worth the work! my first kitty came 6 years ago and 2 years ago i introduced a darling stray. it was my dream to have them become best friends and live happily ever after. two years later i'm still breaking up tussels and fussing at them for annoying each other. BUT...here's the catch! about a month ago i found them laying together on the bed with miko licking ian's ear. they were busted being nice to each other!!!! good luck - i hope your new kitty is feeling better and will be healthy and happy in the new home.