I got my cat at the SPCA and was told that he had his shots and everything. I drove home with the cat in a cardboard box on the passenger side floorboard. Once we arrived home I took the box inside, suddenly the cat jumped out of the box and ran underneath the sofa. This is now for the most part, where the cat remains (at least when I'm around). Whenever I have tried to get the cat out from under the sofa, it hisses and bites at me. So I decided to just leave him alone. He does his thing and I do mine.
I put food and water out for the cat daily and a box for him to poop in which I change every day as well. He waits until I'm not around and then he comes out from underneath the sofa, eats the food and then leaves a poop for me to clean.
And so, this is the way things have been the last several weeks. With the hostilities abated for the most part, we live in a state of détente ... or so I thought.
The other night I woke up and went to the kitchen for a drink of water. When I turned on the light, I was shocked to see my cat sitting on the coffee table staring at me. I thought this might be an opportunity to break the ice, so I smiled and said "hello kitty" but he didn't budge, he just sat there staring at me.
A few nights later, while I was sound asleep the cat came into my bedroom, jumped up on the bed and bit my big toe scaring the living crap out of me. I couldn't sleep after that, just imagining that instead of my toe, that was my neck, those sharp teeth could pierce my jugular vein and in a matter of minutes I could bleed out. Who would know?
So here I am in my room with the door locked and my cat outside. I just know he is planning something.
Things aren't supposed to be like this.
We went through that when we adopted 1/2 of brother sister cats. When we brought sis home, she ran under the couch and wouldn’t come out for 2 days. I thought she was going to die. I tried everything, and I’ve had cats all my life.
My last hope was a companion. We went back to the shelter and luckily her brother was still there. As soon as we brought him home (minutes) she was out, eating, drinking water, and loving on us.
She was grieving, and missing her sibling.
See if your cat was part of a litter brought in. If none still there, get her a little buddy close to the same age.