I adopted a new cat a little over 2 months ago. I did everything by the book as far as proper introductions but so far my resident cat still will not accept the new cat (also female). After the "first" introduction they seemed okay (or so I thought), then one day the new cat attacked my resident cat (nasty mean fight). So I separated them and started the re-introduction process from scratch. Went thru all the proper steps again. I am now to the point where they are both out with supervised visits. Sometimes they do their own thing and don't even bother with each other, and other times one or the other will get aggressive. There is growling, hissing, swatting. Most times I am able to divert the new cat's attention onto something else and it diffuses. But I've had people tell me I shouldn't intervene and let them battle it out. It looks to me like the new cat has tried to make nice, and my resident cat doesn't want any parts of her. To make matters worse, the new cat just recently started going outside the litter box. I'm assuming it's the stress and anxiety of the other cat but have a vet appointment scheduled for tomorrow to rule out any physical issues. So.... at 2 months in am I expecting too much? I will keep at it.... just wondering what my next steps should be from here. I am not comfortable at all leaving them alone unsupervised. When I'm home and can watch them they are both out. When I'm not home or at night sleeping I have the new cat locked away in a spare room which has been her space since she arrived (I do have a gate at the door and leave the door open so they can see each other at all times). I'll take any tips or advice!