When I lived in Asia I "adopted" a lost kitten near my house. As I now had cat food in the house, the local streetcats know how to find me!

I had these two little kitten siblings; no idea where their mother was but they hung around the house, because food. If the food was out they would meow and whine for food, so I would get up to bring them food and they would hiss at me for getting too close to the food bowl before I even had a chance to put any food in.

I never thought that was especially intelligent; "biting the hand that feeds you" and all that.

After dealing with many cats for two years I don't rate cats as very high on the intelligence department. They're basically autistic dogs. They are cuter though. And they don't eat poop off the street.