Hello, my first time posting, really glad to have found this site. Bit of a long post here but I should give the whole story. Thanks for reading. My fiancée and I brought home a rescue 3 weeks ago, a 13 month old male named Odin who had been fostered for a little over 2 months. When he was found and taken from where he had been living on the streets, a site where a pack of ferals gather, he had mange badly, was quite undernourished and apparently was being bullied by the other cats to the point where they weren't allowing him to get to the food source (placed out for them regularly by 2 humane society-trained cat rescuers). His foster mom did a great job with him and his health rebounded significantly. He was however confined to her bathroom for the majority of his foster/recuperation time as he had to be isolated from her other cats due to the mange. He had a series of 3 injections over the course of about a month to cure it. When we visited him the first and only time we met him he was really sweet. Purring, sitting on our laps, letting us pet him and it only took a few moments of being in his small bathroom before he warmed up to us. We spent about 45 minutes with him. His foster mom mentioned she felt that he may have been somebody's pet who abandoned him or he may have gotten lost because he seemed so "non-feral." We've wanted a second cat for a while and we felt he would be a great cat to introduce to our current cat. We didn't see him again until the day we took him home but we continued to get reports on his playfulness and his physical improvement. We brought him home to gradually introduce him to our current cat, a 10 year old female who is affectionate, playful, healthy and had lived with other cats before but not for about 5 years. We knew it was of course going to be a process but we felt ready. We had a rag with Odin's scent on it for Nola to sniff a couple days before we brought him home. Then we brought him home and kept him in a spare bedroom for about 3 days with the 2 of them smelling each other through the door and our 10 year old female Nola being the aggressor. Eventually after about 3.5 days we cracked the door for them to see each other for about a minute and they kept their distance. With each additional door cracking they got closer and Nola was appropriately aggressive while Odin seemed submissive and just wanted to play. It seemed to be going well and as expected. We graduated to letting Odin walk around our small house a few times about 30 to 40 minutes each to get the lay of the land while Nola was in the back yard and could not see him out and about. Then on day 5 we let him out into our living room a number of times with Nola at the other side of the room while one of us gently "corralled" her and made sure she didn't charge him. She was aggressive but we contained her. He was submissive, cautious and seemed like he wanted to just play and be friends. After this we were then able to stand near them and keep an eye on things without touching her and this led to some relatively peaceful tolerance. Eventually they touched noses a few times. We were feeling very excited and optimistic. Now the tables have turned. I realize this is a process that could take months to iron out but things seem to be settling toward some unfortunate patterns that have been a challenge over the past few days. Odin now has full household freedom, no more staying in his room. Odin is becoming the dominant one. Nola still hisses at him and seems to have some assertiveness left in her but as soon as she moves to take a step or 2 away from him, he rushes her. Then she runs, which is of course a bad move, and he chases her. Mainly though, for the past few days she has only come out from under our bed if he isn't in the immediate area and we coax her out. Then as soon as she sees him, unless we give him a squirt from a spray bottle so he'll layoff, she runs back under the bed. She's been eating sparingly and all her funny, lovable little routines she had and places she liked in the house have for now all gone away not to mention the fact that it's been heartbreaking to see her like this. Based on our first introduction to him, we felt as if we weren't at all getting a feral but now he's like a totally different cat. Leading up to our bringing him home, we were simply researching how to introduce 2 cats (my fiancée has had many cats and already had a good deal of experience with this). Now that he seems to be getting more wild as he's settling in, it's prompted me to look up some feral info and I've seen a number of arguments against trying to bring home a cat like this let alone introduce him to a current cat. Anyways, thanks for reading this and any suggestions will help.