Look like most of the cats are very smart, except my cat. She is very very dump. Once, I gave her the cat food, she followed me to her "room", before she started eating, I cover the food with a paper. She was so dump, just looked at me very innocently, as if asking me where is the food. Then she looked around and meow again.
Then she just sat there and wait, until I took the piece of paper away.