So, First of all let me start by saying OMG I can not believe this is my first time noticing that there is an Animalicious forum on TPF!! I was SO excited when I found this last night!! I am usually in the Louis Vuitton & Christian Louboutin Forum... This is awesome!! And I finally can ask for opinions! (THIS MIGHT BE LONG SO I APPOLOGIZE AHEAD OF TIME!!) So now to my HUGE and heartbreaking problem .... I have a my beautiful "baby" Leo, an orange tabby, I have had since I was 19 (I am 25 now) he is spoiled and I love him to death. Had him since he was old enough to leave his mommy, he is a sweetie but doesn't really like people too much other than myself and my aunt. One day, I was at my boyfriends house and a cute little black kitty came up to me and started rolling around rubbing up against me purring and licking me, I instantly fell in love, started talking to my boyfriends family and the neighbors and come to find out she is a stray and the neighbors take turns feeding her but she has no where to call home, after that I knew there was no way I could leave her there, but also knew my cat wouldn't appreciate it. So I took her home called around, no one could take her (of my friends) so I decided, I have to find a way to make it work and keep my new baby. I brought her home kept her away from my cat and googled all the right ways to introduce them. The second day I had her at my house, I took her to the vet she was 100% healthy, my biggest concern was FIV because of my cat who is FIV free, vet estimated her to be 9-10 months old I did EVERYTHING I thought was right, from separating them, slowly introducing them with each others scent (rubbing a sock against one and putting it with the other, letting them smell each other through doors, I even spent 100 on a cat tent and put one of them inside and one outside to come by giving them treats when they were good) during this whole process there was NO hissing EVER. So a month and a half into doing all this daily, I put them together in a room, my mom accidentally opened the door, which i wanted close and all hell broke loose, my cat, leo ran around the house like a crazed cat and the new kitty (princess aka creeper) ran right after him jumping on his back, hissing and screaming started...I was so freaked out, i grabbed her not caring what harm she would do to me and separated them, did what i was doing before and tried again a few weeks later, again, all hell broke loose, but 10 times worse, bitting hissing cat hair in chunks flying everywhere, it was bad! In the meantime, I am lucky to live in a large house (with my mom and aunt, yes I still live at home and love it lol!) so we have three floors, which includes a huge furnished basement. I would keep one cat in the basement, while the other roamed the house, then switch back and forth. Usually my cat leo stays in my room with his litter box and is content, while princess roams the house, then I put princess in the basement and leo roams the house. This happens over and over and over again throughout the day. When I am at work, princess is in the basement, with the door open (weather permitting) which leads to the outdoor enclosure I had built, which she loves, and the basement is huge and furnished so she loves it and is content. Then when I get home Leo goes in my room, sleeps and princess comes up. As you can imagine, this is NOT ideal, I have had her for about a year now. I do this in the middle of the night sometimes, when one scratches on the door for several minutes to be let out, I switch them off. Other things to note: -They each have separate areas for food and separate litter boxes -Both cats have been fixed/ neutered -Leo (older cat is male tabby approx. 6 y/o) Princess (new cat is just under 9 months old and a black cat, not sure type?) -Leo has a peeing problem, for about 4 years now, he tends to pee anywhere he wants, yet also pees in his litter box which is cleaned every day, took him to the vet no UTI or anything health related, just behavioral -My life is hell and stressfull and I am loosing hours and hours of sleep and its brekaing my hear because I just want my babies to be happy together PLEASE HELP ME Any tips or advice, what would you do, what should i do, has this happened to anyone?!