Brumation is a managed fast through the coldest weeks, and an old body has less margin for it than a prime adult. A young, heavy bearded dragon or tegu in peak condition can sleep for weeks on its reserves; an elderly animal that is quietly thin, mildly dehydrated or carrying an undetected problem may not wake in the same shape. The checks below decide one question: is this reptile fit to brumate at all this year?
The Vet Check Comes First
Book it while the animal is still warm, active and digesting — not the week you plan to cool it. Tell the vet brumation is the question. For an older reptile, that visit should cover body condition by feel along the tail base, spine and hips, the mouth for sores or discolouration, eyes, nostrils and vent, and any lumps or swellings that are new since last year. A faecal check is worthwhile where the vet advises it, since a parasite load an active animal tolerates can drag a sleeping one down. If the animal has had a wobble this year — a hunger strike, a respiratory episode, egg-laying trouble, a course of treatment — raise it specifically, because recent illness is one of the clearest reasons to keep an elderly reptile warm, lit and feeding through winter instead.
Weight, Condition and Hydration
Weigh the animal on the same scales you will use through winter and compare the figure against its own trend, not a chart for the species. A stable weight across autumn is reassuring; a slow slide of even a modest share of body weight is a reason to pause. Feel for condition as well as reading the number: prominent hip bones and a thin tail base say the reserves are not there, whatever the scales show.
Hydration matters just as much. Offer regular soaks or showers in the weeks before cooling, keep fresh water available, and watch that the animal is actually drinking. Skin that stays tented after a gentle pinch, sunken eyes or thick, stringy saliva all point to an animal that needs rehydrating and a vet conversation before any temperature drop.
Skin, Shed and the Empty Gut
Check the whole body under good light: stuck shed around toes and tail tip, which tightens as the animal rests; mites, especially around eyes and skin folds; and any sore, lifted scale or wound that could fester unnoticed during weeks of stillness. Deal with retained shed before cooling, not after waking.
Then manage the gut. Food eaten too late, as temperatures fall, can sit undigested in a cooling animal. The usual pattern is to stop feeding while the enclosure is still at full warm temperatures, allow time — commonly a couple of weeks, guided by your vet and species — for normal droppings to clear what remains, and only then step temperatures and light hours down gradually. Water stays available throughout, including during brumation itself.
During the Slowdown
Even a cleared animal gets checked, not forgotten. Weigh periodically with minimal disturbance, top up water, and note the dates. Wake and warm the animal and call the vet if weight falls sharply, discharge appears at the nose or mouth, or it becomes restless and weak rather than drowsily still. Recording each of these checks in KinsLe's Pet Passport — weights, vet findings, cooling dates and waking notes in one packet — means next autumn you are comparing evidence, not memory.