So as some of you know I've had to bring in several of the Ferals over the last few months due to blockages and accidental neighborhood poisonings. To say it's been a challenge is an understatement but things are getting nasty. Charlie - resident kitty has become more aggressive than normal. Now I expected some trouble. I expected this to be hard and I'm taking things really slow as a result. Really slow. I had no illusions this was going to be easy. Over the weekend I had my friend stay as she's from out of town and needed a place to crash for an appointment early the next day. He cornered her. He made a noise I've never heard him make before and it was angry. When I went upstairs she was pushed into a corner by him and he was scary. He's never done that before. She was really scared of him. It was so bad I locked him in my room with me for the night. He's done something similar to her before - but not this bad. She does have two cats at home but the PJ's she had one were fresh washed - this doesn't mean he didn't smell the cats on her bag or other clothes mixed in The night before he's been biting Mia (first Feral) in the neck. She runs from him and sometimes hits him back. Charlies always yowls / cries at night. Last night it was unusually loud. Tonight I walked into Mia's room, Charlie was sitting outside it and he went for me. Mia barely leaves her safe room. She's never ventured past the first set of stairs and that's a rare thing she'll do that. She's is scared. I lost as to how to help him. I'm lost as to what to do and I'm worried the situation is not going to work out. Charlie has always had some issues with aggression (I think redirected aggression) and in a large part this is my fault for not dealing with it sooner. Occasionally he'll just turn and attacked your leg or bit you hard. He makes a warning sounds before he does it, but there is no stopping him when he makes that noise. Basically - run. He's almost schizophrenic I swear. He is a very loving cat too. Sleeps beside my head. etc. Timeline of cats and other issues: Situation 1 - Mia brought in in June for a blockage. He barely tolerates her. One second sweet with her, lying down with her, next second - he'll try to mount her or bite her and hiss at her. He's not hissed in awhile, except at me this past weekend. Situation 2 - End of July - White label brought in - accidentally poisoning from a neighbor. She could barely breath on her own. Situation 3 - Neighbor had a baby, you can hear him cry sometimes through the way (I live in a backsplit semi-detached.) For a while we thought it was another cat outside - nope it's the baby. Things started to go at the is point a bit worse. Nothing bad though. Situation 4 - Braveheart brought in to be with White Label as not to leave her out alone. (Mia, White Label and Braveheart are litter mates / sisters - all feral). She was brought in Sat the 8th of September. Braveheart and White Label have not be introduced to Charlie - not the right time - but they will have to be. Layout: Mia in a safe room - door is always open , she is free now to roam after slow intro to Charlie. W.L and braveheart blocked off with a makeshift wall in the rec-room together. (Their issues are a whole other ballgame.) Charlie is blocked upstairs every night with a double gate as the wall can be breached if someone really wants too. If the house is empty - one kitty gate during the day. The rest of the time he is free to roam I've tried Feliway - it makes Charlie worse. They are all fixed. Thoughts, suggestions, questions? Has anyone else had this happen? Did it work out in the end? I'm certainly willing to give it all the time it needs. I am really scared this is not going to work out at all. Edit to add: Mia hides behind me when Charlie comes into her safe room.