📦 If I fits, I sits
Why Does My Cat Sit in Every Box?
You bought the bed. The cat is in the box the bed arrived in. This is well documented.
Boxes measurably reduce stress
This is one of the few cat behaviours with a clean study behind it. Researchers in the Netherlands gave shelter cats either a hiding box or no box on arrival. The cats with boxes recovered from the stress of arrival significantly faster, with lower stress scores over the first weeks.
Hiding is a cat's primary coping strategy. Faced with something frightening, a cat's instinct is not to fight or flee so much as to become unavailable. A box provides that instantly, which is why a cardboard box is genuinely useful kit in a stressful household and not just a joke.
Enclosed spaces are warm and defensible
Two practical benefits stack on top of the psychological one. A box has walls, so a cat inside it can only be approached from one direction, which cuts the number of things it has to monitor to roughly one.
And cardboard insulates. Cats are comfortable at temperatures higher than most homes are kept at, so a small enclosed space that traps body heat is simply a nicer place to sit than an open floor.
The square-on-the-floor thing
Cats will also sit inside a square of tape on the floor, which has no walls, no warmth and no hiding value. A citizen-science study found cats were drawn not only to taped squares but to illusory squares — the Kanizsa illusion, where four notched circles imply a square that is not actually drawn.
That suggests cats are responding to perceived contours, which is a more interesting result than the meme deserves. They are not reasoning about boxes. Something in the visual system reads an enclosed shape as a place, and they sit in it.
What to do with this
Keep a box. Genuinely. If you have building work, a new baby, a visiting dog or a house move coming, put a few cardboard boxes in quiet corners beforehand — openings facing out, high-traffic routes avoided — and leave them.
The one caution: a cat that has started hiding much more than usual is not enjoying a box, it is coping with something. Sudden, sustained hiding in a cat that was previously sociable is a reason to look for a cause — illness, a new stressor, a change in the household — rather than a cute habit.
Quick answers
Why does my cat prefer a box to the bed I bought?
The box has walls, insulates well, smells of nothing alarming, and can be abandoned without loss. An open bed in the middle of a room offers none of those things.
Is it bad that my cat hides in boxes all day?
Occasional retreating is healthy. A marked increase in hiding, especially with changes in appetite, grooming or litter use, is worth investigating — it is a common first sign of illness or stress.
Do cats really sit in squares of tape?
Many do, and a citizen-science study found they were also drawn to illusory squares with no real outline, suggesting the response is to perceived shape rather than to a physical enclosure.