I have 4 indoor cats and live in a mobile home. One cat, a female, weighs 20 lbs ( I have her on diet food) hates other cats and people. I am feeding 3 feral cats. My neighbor turned me into the office for feeding these cats as she says I attract wild animals ( This is another story), so I stared bringing them inside. Last night I brought on of the outside kitties in while I have the others in separate rooms. The 20 lb'r can't be with any other cat. After I let my kitty outside, I let Callie out of her room. She smelled the other cat and went wild. She hissed and growled at me and chased me into the bathroom where I was held up for 10 minutes. I slowly opened the door grabbbed a piece of furniture to protect myself and coaxed her back into her room. I am afraid of her, this is not the first time this has happened. I want to neuter the outside kitty and bring him, I'm afraid of going thru this again and again. There is no one that would want her. I got her when she was about 3 threes old, now she's about 8 yrs. I don't want to put her down but she rules my house. I have tried to introduce her to my other kitties and she growls and I mean she's like a tiger. Can any one help me?