"or we could find some spiders. spiders are meat, right?" And spiders eat other spiders. So it's probably okay if cats do, too. Otherwise, most monsters are vegetarian, so this is naturally far outside his area of expertise.

Sans-Serif passes by a door that even he knows didn't lead down to the kitchens yesterday. Yet he gets the familiar itch in the back of his skull that tells him it leads to the kitchens today. He stops, tugs on Frisk's arm to make sure they've noticed, and then stands on tiptoes to open the door.

Sure enough, on the other side are a set of stairs leading down.