Cats Sleep Curled Up for One Key Reason — and It’s Not Comfort

A cat curled into a tight ball can look like the picture of pure comfort, but that familiar sleeping shape is more practical than it appears. It is one of those everyday pet behaviours that looks soft and cute on the surface, while carrying an older instinct underneath.

The reason is not simply that cats enjoy looking cosy. The supplied Mirror report points to the same explanation supported by veterinary and pet-behaviour sources: the curled position helps cats protect themselves while managing body heat during rest.