WANTED: Experienced cat owner in between pets, or maybe with one but no more, to take on the challenge of socializing a stray-feral cat. I have befriended him at the expense of my other pets, all of whom are "special needs" as they say: blind, elderly, infirm. Our new friend was badly injured when he came to us and is now on the mend. But his social skills need work. He is fearful and combative one minute, sweet the next. But he will, with a few week's patience, make a nice companion for the right person. Here's the story: The Black Cat. We've taken to calling him BC. He's medium bushy with Simple Green eyes. BC has been a fixture in the neighborhood for years. Everybody knows him, and his range has extended along more than a half a mile of our road. When he'd visit our house, he'd sneak in through the back door to snatch a bite from our cats' food table. If one of us saw him, or he saw us, he'd blast away in a blur so fast you'd