My two are just getting to know each other (Josephine was introduced about a month ago.) It's been slow and gradual, but positive. Jo's gone from hating Napoleon and beating him up to putting up with Napoleon and occasionally playing along. Just now I had to pick them both up in one arm to relocate them, and in the past, this would've resulted in an IMMEDIETE cat fight. Well, this time, Jo let Napoleon groom her face for about a minute before starting to growl a little, and after about 30 more seconds she was sick of it and they started to fight -- but seriously, we're talking a minute and a half of supercute, oh-so-sweet grooming! AWWWW!