My 17 year old cat, whom I have had since she was 8 weeks old, has always been afraid of people, including me. We were told she was born under a porch when we adopted her and her sister. She hides under our couch almost all day. When she does come out, she keeps her distance. She won't come near me, and runs away if I get too close to her. I love cats and have never hurt her. Her sister is a little skittish around people she doesn't know, but let's me kiss her and pet her. She doesn't run from me. She has matts on her back but if I try to catch her to comb them out she runs back under the couch. I call her my ghost cat. I don't know what to do to help her. My vet said to keep her in a cage to try to get her used to me. That didn't work. She also hisses at me if I get close to her to put her food down.