Yes, my two furkids Cirrus and Sky are bottomless pits. I used to free feed but now I can't because of these two.
Sky was a stray so I guess he doesn't realize when his next meal will be. He should by now since I've had him for 1 year and 4 months now. Cirrus is a nervous, skiddish cat and is semi-feral so I think he eats because he's upset.