If you’ve ever brought home a package, you’ve probably noticed your cat ignoring the toy and climbing straight into the empty box. It might seem funny, but there’s a good reason behind it.

Cats naturally seek small, enclosed spaces because they make them feel safe and protected. A cardboard box provides shelter from potential threats while allowing them to quietly observe everything happening around them.

Boxes also help reduce stress. Animal behavior experts have found that cats often become calmer when they have a cozy hiding spot, especially in unfamiliar environments.

Cardboard is another bonus because it retains warmth, and cats prefer temperatures much warmer than humans do.

So the next time your cat claims your delivery box as its new favorite spot, remember—it’s following instincts that have helped felines feel secure for thousands of years.

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