A friend trapped a cat and had it neutered, then needed to find it a home. I took it in four days ago. I have fostered cats before but not strays/ferals. He is about 10 (we think), uses the litter box, has let me pet him, but has hidden in a corner of the room for four days. I am not sure how to approach/help him. He is a sweet tabby. Runs away from me if I get too close. He stays in two smaller rooms, mostly by himself. I come in to coo at him and talk a bit. How long will he hide? Should I try to approach/pet him? How to best help him feel calm and safe? Can I help him become socialized and adoptable? Wondering if he is actually feral, or just stray for a long time. He does meow to me when I talk to him and he has let me pet him after neutering. Any advice welcome!