Hi- I found this site because I am in need of serious well thought advice. we have 2 indoor cats that were bottle raised. They are now about 5 years old. We recently as in 5 days ago brought a new cat in, after having tests, vaccinating and confirming she was spayed. after a couple of days of through the door introductions, we did the full introduction. The 2 were curious, guarded, a little hissing-the new was scared, intimidated, and even less hissing. Things went to everyone watching everyone and passing each other. Last night, the new cat started her "attacks". first was our female and it was nasty and brutal, she went after her again this morning. While sitting here typing this, she strategically planned, no joke, a air strike on the male. She maneuvered on top of the furniture until she was poised and pounced. when is it time to say enough is enough? my 2 are not used to aggression, fighting or being attacked, but i so want things to work for this homeless little girl, who by the way was dumped in our cul-de-sac at the end of november and had to fend off the bully neighborhood cats until we took her to the vet and tried to home her. Please help me!