Often not an emergency on its own — but check carefully and don't ignore it. A bearded dragon can stop eating for a normal reason, especially brumation (a hibernation-like slow-down in cooler, shorter-day months) in a mature, otherwise healthy dragon with correct set-up. But not eating can also mean impaction, metabolic bone disease, infection, or an incorrect enclosure temperature. Check the husbandry and your dragon's weight and behaviour, and see a reptile-savvy vet if there are other signs or the weight is dropping. A juvenile that stops eating, or any dragon that is also weak, straining, or losing weight, needs to be seen.
## First, check the husbandry Bearded dragons are ectotherms — they can only digest food at the right temperature. Before anything else, check the enclosure: a basking spot around 38–42°C (100–108°F), a cooler end, and a working UVB light. A too-cold tank or a burned-out UVB bulb is a very common reason a dragon goes off its food, and it's fixable.
## Brumation versus illness - Likely brumation: a mature dragon, in autumn/winter or with shortening daylight, that hides, slows down, and eats little but keeps a stable weight, normal droppings when it does go, and is otherwise bright and normal-coloured when active. - More likely illness: a juvenile (juveniles shouldn't really brumate), weight loss, sunken eyes, a persistently dark beard with lethargy, straining or not passing droppings, weakness or a rubbery jaw, or any swelling. These need a vet.
## What to do Weigh your dragon (a kitchen scale works) and track it, correct any husbandry problem, and monitor closely. If your dragon is losing weight, is a juvenile, or shows any other red flag, book a reptile-savvy vet rather than assuming brumation.
Get to a vet immediately if you see any of these
- Not eating with weakness, tremors, or a soft/rubbery jaw (possible MBD)
- Not eating with straining or no droppings (possible impaction)
- Ongoing weight loss, sunken eyes, or a persistently dark beard with lethargy
- A juvenile bearded dragon that has stopped eating
- Not eating with open-mouth breathing or mucus (possible infection)
Common questions
What is brumation?
Brumation is a reptile's version of hibernation — in cooler, shorter-day months a mature bearded dragon may slow down, hide, and eat little or nothing for weeks while keeping a stable weight. It's normal in a healthy dragon with correct husbandry, but it should be distinguished from illness by weight and behaviour, ideally with a vet's input if you're unsure.
My baby bearded dragon won't eat — is that different?
Yes. Juveniles are growing fast and shouldn't brumate, so a young dragon that stops eating is more concerning and should be checked by a reptile vet, along with the enclosure temperatures and UVB.
Could my heat lamp being off cause this?
Absolutely. A too-cold basking area or an expired UVB bulb is one of the most common reasons a bearded dragon stops eating, because it can't properly digest or process food. Check and correct the set-up first.
Sources
This page is general guidance, not veterinary advice, and cannot diagnose your pet. It does not replace an examination by a licensed veterinarian. When in doubt, treat it as an emergency and contact a vet or your nearest 24/7 emergency clinic right away.
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