Those are pretty cats, they have this snob vibe in them, like "i'm the boss here hooman, so give me my food!" Haha like that. But if its that cute, I'm ready to be their slave, lol. We also have cats with the same habit, like they really know when is their eating time. And if you're a second late, expect them to come at you while meowing loudly as if they are complaining, lol.