I got a new cat a month and three days ago. At first I kept the cat seperate from my resident cat for about a week. I then started swapping scents and spaces. I then got a large cat enclosed tent with a see-through mesh enclosure and put the new cat in there and my resident cat out in the same room. At first the new cat started hissing, but then after several days she stopped when my cat went up to the tent, so I figured it was time to try them out together. The first day the new cat hissed and growled at my resident cat, but I kept my resident cats attention away from the new cat. For the most part they found seperate spots and slept. I had them out for 4 hours. The next day new cat still hissed and growled when she saw him, but they managed to stay away from each other. No fights in 6 hours. The third day my resident cat keeps trying to get too close and the new cat still hissed and growled, but this time she swiped her paw at the resident cat, but she did not hit him because I put a pillow between them. But after that my resident cat went and layed down and the new cat sat out in the open on a chair. Am I doing this wrong? I am so scared this will not work, as in the past I had a two cats that never would get along and I had to keep them separated permanently. That was such a stressful way to live and I swore that I never want to do that again, but at the same token I have already developed deep feelings for the new cat and don't want to take her back to the shelter. My resident cat never hisses and I would be willing to bet that he would never start the fight, but his downfall he is too brave and does not know when to back down and I don't want him to get hurt. However, the not backing down and continue to approach may be a sign of aggression from my resident cat. The new cat has no claws, I know horrible, I'm so against declawing, but she was like that when I adopted her. I still put the pillow in between them when she swiped at him to stop the tension and keep the new cat from biting. My resident cat has no teeth. His teeth were also gone when I adopted him. Any suggestions? Has anyone ever had hissing and growling and it ended up working out?