I dunno, ive run into a lot of cats like that. They just seem to hate people. They hide and hiss at you. Irritating.
I had a dog growing up, but he was pretty stupid. When he died i really wasn't that upset. He was disobedient (or just dumb) and just didn't connect.
Later on, I had a golden who was relatively bright and had an awesome personality. Loving, happy, liked to be involved in everything. I had to give him away to a friend he knew very well who lived on a farm, and i bawled like a baby for a week.