If we take a 2-3 day weekend and go somewhere, we leave the cats with extra water (of course) and extra food.
One of the food dishes I sort of 'hide' because I know that otherwise my cats will eat ALL their food the first day. Even with hiding it, I am very sure that it's gone early-on the second day.

For some reason, all three of my cats have been piggys Maybe they learn it from each other?