Sigh. Both of these cats I have now (they were brothers from the same litter we got at a shelter) have been totally fixated on food since we brought them home as kittens.
I have often wondered if they were deprived of food for some extended period of time and never got over it.
When we had cats in the past, we used to leave a large bowl of food out all the time, and they could eat as they pleased.
We had to buy an automated feeder that dispenses cat food four times a day, and when they hear the food drop into the metal bowls in our garage, they go from fast asleep to 120 MPH in a tenth of a second, and there is a frantic, high speed dash where they go through the cat-door flap into the garage, and eat as if they had been deprived of food for a week.
It was the one on the right that grabbed the chunk of butter.
He is not to be trusted. It reminded me of these notes I saw on the Internet:
Heh, cats are funny critters!