Your cat was fine yesterday. Today she is under the bed and will not come out. This guide explains every real cause of sudden hiding in cats, how to tell whether it is behavioral or medical, and what to do in the first 48 hours.

Cats are biologically wired to hide stress. This guide covers 15 signs of stress in cats that most owners miss, from displacement grooming to changes in resting posture — and what to do when you spot them.