Over two years ago somebody dumped a cat outside of my house (either randomly or because I am this neighborhood's "crazy cat lady", which I don't especially mind). The cat was severely injured and hid under our porch and despite a vast neighborhood effort it took me a year to catch him (I'm very persistent). When I finally got him to a vet it turned out that he was probably beaten or otherwise abused... his back joints were fused together (from breaks that had healed incorrectly), all of his teeth were broken, he was completely deaf, and was FIV positive. If he had been otherwise sick or in declining health I'd have euthanized him, but after consulting with multiple doctors they all suggested that he would have a very good quality of life still with the proper care. He's not at *all* cat aggressive and neither are mine, so I'm not concerned about FIV transmittal, but I would like some advice on making him more comfortable in my home.
He's been living with me for over a year now and is still terrified of people. The first eight months he lived just in my large bathroom... I built a handicapped cat ramp and shelf so he could have a window and gave him a cushy chair and heating pad in the walk-in closet. For the first couple of months he growled at me, but then we settled into a routine where I would sit a couple feet away and put treats down and he would accept the fact that I was there. After six months he let me pet him but only grudgingly, and at the eight month mark (or so) he decided to live under my bed instead (I only kept him in the bathroom on purpose the first few months... he stayed in there on his own with the door cracked open). Now that he lives under the bed he comes out when he thinks I'm gone (which isn't always true since he's deaf) and he lets me reach under there to pet him, which he seems to enjoy. He always licks me when I pet him, which I think is more of a mutual grooming instinct. On very rare occasions when he's been out I've been able to pick him up and hold him, but he turns into a "taxidermy cat" and is always relieved when I put him down (he then "speed walks" back under the bed).
Does anyone have any suggestions for making him feel more comfortable? Over a year is a long time for a cat to still live under the bed, in my opinion, but who knows what terrible things may have happened to him before. As long as he feels safe under the bed he's very affectionate, but it's important for me to check his health with the FIV and that's difficult to do when he hides all the time. I know he roams around with the other cats when he thinks I'm gone or asleep, and I know he's making progress, but I'm certainly open to suggestions...