Gotta love sarcasm
The tone of this note and the fact that it’s in all caps indicates that these parents’ children are the type to whine, “But there’s nothing to eat!” So as a result, Mom and Dad have been forced to employ some good old sarcasm.
Of course, the kids aren’t really going to eat the cat or starve to death. It’s much easier to just walk down the stairs and take a peek in the refrigerator. But if there’s nothing in the refrigerator… Let’s just say we hope the family cat is still alive and well.