The Pet Bed is a furniture you can build (the Decor page).
In-game description
A round cushion with a red rim. A companion at home sleeps on it at night, healing twice as fast and growing happier each night; one following you sleeps on it while you sleep nearby. One companion to a bed.SHOWN IN THE BUILD RING
Building it
It costs 3 
Wood, 2 
Woolen Cloth, 2 Water spirits. Take it down with DISMANTLE to get its cost back (see Building).
