El Gato Negro made the rounds of the apartments and maybe as many as half a dozen apartments left out food for him. I understand that when he felt he wasn't getting enough, he'd hunt (successfully) ducklings and goslings in the creek behind the apartment. When I met him, he was friendly and let me pet him and pick him up. He was actually a little scrawny at that point and his fur was a little dull, but he was very active and in good health.
Around 2013, the apartment manager told me that his owners had skipped and had left him behind. She knew I'd been looking for a cat to keep me company, so would I like to take care of him? That sounded like a great idea, so the next time El Gato Negro came by, I picked him up and carried him up to my apartment. He took to living indoors just fine and the first night he was there, I went to bed and he joined me about 10 minutes later and snuggled into me, something he's tended to do every night since then.
In about a month of regular feeding, he got to a proper weight where he didn't look scrawny anymore and his fur was glossy. In his case, "proper weight" means 17, 18 pounds, which is the size of a small bobcat. He's about that big, too.
He picked up the name Sanchez when The Babe and I were at Worldcon and heard John Scalzi read a very funny short story he'd written entitled "The Other Large Thing," in which the name "Sanchez" figured prominently. (It's a fast read; if you've not read/heard it before, please take a couple minutes and do so now.)
Sanchez, as far as I can tell, is 13, possibly 14 years old. He's all black save for a little line of white on his chest. And he still tends to snuggle into me at night.