Hello everyone! Its been awhile since I posted.I am in desperate need of advice . A neighbor of mine up and moved and left her cat behind and the cat was put outside. She was so afraid of the outdoors. I tried for days to find her and finally did a couple of days ago and she led me to a litter of 4 kittens. I scooped them up and her and brought her in my house.I have her staying in a big pet carrier i have. I let her out to use the litter box and eat, but the problem is I have 3 cats if anybody remembers me I have Yucky,Heather,and Cocoa they are 12,11,and 10 yrs old. Ive got to the point already that i let this new cat out and let her roam freely because she constantly whines wanting out of the cage.so far my cats ony hiss at her and she hisses back.I dont know if they would attack her or not but I cant keep her isolated in that cage. any advice would be greatly appreciated.Thanks!