Bit of background I'm her 4th owner. No idea about first, second was my mums awful neighbour who locked her out all day let her in just to throw her out again and then was going to give her to rspca. My mum took her in officially she used to come in anways but she bullied all the other animals dogs included so came to myself. I'm a life long dog owner so was amazed at Litter training, showed it her and that was it. Lived somewhere that had plenty of room for all the neighbours cats to not cross paths, life was good. I've now moved to a terrace, opened my back door and there was 4 Cats just chilling peacefully. Literally everyone has a cat which is fine by me, some are really friendly and will try and say hello or come in but scouts not having it one little bit. She chases all the other cats away, is very vocal and has started peeing everywhere. I heard this scoot scoot sound coming from the bathroom and there she was peeing on my little mans towel, by the front door, by the back door and a cupboard. I've started confining her to the one room with her Litter tray. Anyone any idea how to manage cat aggression? I think it's fear based, she'll chase off a cat then run back in and hide. Has those plug ins worked for anyone?