Why Do Cats Like String. Hunting is an innate behavior in cats meaning it’s an instinct and normal behavior for all cats. Cats can ingest and expel bits of string, twine, etc that they’ve chewed and swallowed.
But there are some other interesting reasons as well: A piece of yarn being wiggled and dragged across the floor might awaken this instinct in today’s kitties. Cats with minor or extreme anxiety issues will find comfort in weird things.