An appetite that ignores the calendar
Where a ball python fasts at the first hint of winter, a king snake usually keeps hunting. King snakes are hardy, active American colubrids with famously uncomplicated appetites, and a pet king's winter looks much like his summer: patrols at dawn and dusk, enthusiastic meals, an owner slightly startled by both. That reliability is exactly why the winter mistakes with this species are the ones nobody expects — cooling him down for a season he never asked for, and feeding him into a waistline nobody noticed.
Why a pet king doesn't get cooled
Brumation appears in king snake care sheets because breeders use a winter chill to synchronize spring breeding. A pet king gains nothing from it, and a cooled snake is a snake whose immune system and digestion are idling — which is why the standard rule is never to cool a snake who has eaten recently, since a full stomach in a cold snake can rot rather than digest. Keep his lights on a normal day, his temperatures steady, and his meals coming; if he takes a short self-imposed break from food in the darkest weeks, a healthy king in good condition can simply be offered again in a week or two.
The winter setup
Hold a warm spot of 85–88°F on a thermostat with a hide over it, a cool end in the mid-seventies with a second hide, and fresh water he can also soak in. Add a humid hide when a shed is coming, because dry heated air is as unkind to king snake sheds as to any other snake's, and check the tail tip and eye caps on every shed skin. King snakes are strong, curious escape artists in every season; a clipped, weighted or latched lid is part of the setup, not an accessory. Substrate deep enough to burrow in keeps this species occupied through the long indoor evenings.
The real winter work: the waistline
A snake who eats eagerly all winter in a warm house, moving less than a wild king ranging open country, gains weight quietly. Kings are prone to getting fat, and fat in a snake means a shortened life. Weigh him monthly and look at his shape: you want a rounded, muscular body with a smooth taper, not a snake who is round in cross-section all the way down with visible folds when he bends. Adjust meal size or spacing before the shape changes rather than after, and resist the pleading patrol at the glass — it is a hunting reflex, not hunger. Those monthly weights and meal notes are worth keeping properly, and his KinsLe Pet Passport holds them with his records, so a vet can see the trend at a glance.