How long can a bearded dragon go without eating?

Healthy adults can manage weeks with little food during brumation if their weight stays stable. Juveniles need daily feeding and should never go more than a few days without eating — a youngster refusing food needs a vet check quickly.

Is my bearded dragon brumating or ill?

Brumating dragons slow down, sleep more and eat less, but according to the RSPCA they should not stop eating entirely or lose weight. Weigh weekly: stable weight suggests brumation; any weight loss, diarrhoea or discharge means book an exotic vet.

Can low temperatures stop a bearded dragon eating?

Yes. Bearded dragons need a basking spot of 38–42°C to digest food properly. Chronically low temperatures slow the gut, causing appetite loss and even impaction. Check both ends of the vivarium with digital thermometers before assuming illness.

What are the signs of impaction in a bearded dragon?

According to Vet Help Direct's UK vet team, impaction signs include lethargy, inappetence, bloating and failure to produce faeces. Loose or large-particle substrates such as calci-sand and bark chips are common causes. See an exotic vet promptly.

When should I take a non-eating bearded dragon to the vet?

See a UK-registered exotic vet if your dragon loses weight, refuses food for more than 3–5 days outside brumation, or shows any other sign — sunken eyes, diarrhoea, bloating, breathing changes or weakness. Always rule out illness before assuming brumation.

Reptile Health

Bearded Dragon Not Eating? UK Vet Guide

Published 18 July 2026Last updated 18 July 20265 min read

Quick answer

A bearded dragon that stops eating is usually reacting to incorrect temperatures, brumation, impaction or illness. Check the basking spot reaches 38–42°C and the cool end 22–26°C first. Weigh weekly — weight loss means a vet visit, not brumation. Persistent refusal needs a UK-registered exotic vet.

Key takeaways

A bearded dragon that stops eating is usually reacting to **incorrect temperatures, brumation, impaction or illness**.
Check the basking spot reaches **38–42°C** and the cool end 22–26°C first.
Weigh weekly — **weight loss means a vet visit**, not brumation.

First check: temperatures

According to the RSPCA, most appetite problems in bearded dragons trace back to husbandry — and temperature is the first thing to rule out. Bearded dragons are ectothermic: they cannot digest food properly when too cold, so a chilly vivarium quickly shuts down appetite.

Zone	Target temperature
Basking surface	38–42°C
Cool end	22–26°C
Night minimum	Not below 20–22°C

Measure with a digital thermometer at the basking surface and cool end — dial gauges are unreliable
Run every heat source through a thermostat and check both ends daily
If the room drops below 20–22°C at night, add a ceramic (non-light-emitting) heater

Vet Help Direct's UK vet team notes that chronically low temperatures can cause gut impactions, slow metabolism and poor immunity — all of which suppress appetite. See Bearded dragon care UK for the full setup.

Brumation: the normal reason

Brumation is a natural slowdown over the cooler months, similar to hibernation. According to the RSPCA, during brumation bearded dragons slow down, sleep more and eat less — but they should not stop eating entirely or lose weight.

Brumation-like behaviour is normal in healthy adults, not juveniles
Weigh your dragon weekly — stable weight supports brumation; falling weight does not
If weight drops, Vet Help Direct advises raising temperatures and lighting back to normal and booking a veterinary examination
Never assume a first-time appetite loss is brumation without checking husbandry and health first

Impaction

Impaction is a blockage of the gut, and it is a common reason UK bearded dragons stop eating. According to the RSPCA, risky substrates include:

Calci-sand — can clog the digestive tract, especially when temperatures are too low for good digestion
Bark, wood chips, crushed walnut and corn cob granules — easily swallowed and indigestible
Loose substrates generally for juveniles — use reptile carpet, tiles or paper until fully grown

Signs of impaction, according to Vet Help Direct, include lethargy, inappetence, bloating and failure to produce faeces. A dragon with these signs needs an exotic vet — do not wait for it to pass on its own. More detail in Reptile impaction UK.

Illness and parasites

Appetite loss is one of the earliest signs of most reptile illnesses. According to the RSPCA and Vet Help Direct, watch for:

Parasites — abnormal droppings, diarrhoea or constipation coupled with weight loss; your vet can test a fresh faecal sample. Coccidiosis is most common in young dragons kept in poor hygiene
Metabolic bone disease (MBD) — muscle twitching, swollen limbs, weakness; caused by lack of UVB and calcium (see Reptile metabolic bone disease UK)
Respiratory infection — increased breathing rate or effort, nasal discharge and lethargy
Egg binding — a bloated, restless female with reduced appetite needs a nesting box and may need urgent vet care
Mouth or dental problems — reluctance to chew, favouring soft food

Stress and settling in

A dragon that has just arrived often refuses food for days. According to the RSPCA, you should:

Set up and run the vivarium for at least a week before bringing your dragon home
Leave the new dragon with food and water but no handling for the first week
Expect reduced appetite while it adjusts — offer food daily and remove uneaten insects so they cannot bite

Other stressors include a vivarium that is too small (minimum 120 cm long for an adult), cohabiting dragons (house separately), and frequent disturbance. Over-handling also suppresses appetite — keep sessions to 10–15 minutes.

When to see an exotic vet

Book a UK-registered exotic vet promptly if you notice any of the following:

Weight loss at any point, even during suspected brumation
No food taken for more than 3–5 days outside brumation
Bloating or no faeces for several days (possible impaction)
Diarrhoea, sunken eyes or a thinning tail base
Open-mouth breathing, wheezing or nasal discharge
Muscle twitching, swollen limbs or a soft jaw (MBD)

Reptiles hide illness well, so by the time appetite disappears the problem may be advanced. This guide cannot diagnose your pet — a hands-on examination by an exotic vet is the only safe route when the checks above do not solve it.

Sources & further reading

Facts in this guide are rewritten in plain English from publicly available UK advice. We name the organisation where a specific point comes from their guidance. Links below go to the original pages — use them to read the source material directly.

PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Guidance checked against sources listed below (last updated 2026-07-18).

Frequently Asked Questions

How long can a bearded dragon go without eating?: Healthy adults can manage weeks with little food during brumation if their weight stays stable. Juveniles need daily feeding and should never go more than a few days without eating — a youngster refusing food needs a vet check quickly.
Is my bearded dragon brumating or ill?: Brumating dragons slow down, sleep more and eat less, but according to the RSPCA they should not stop eating entirely or lose weight. Weigh weekly: stable weight suggests brumation; any weight loss, diarrhoea or discharge means book an exotic vet.
Can low temperatures stop a bearded dragon eating?: Yes. Bearded dragons need a basking spot of 38–42°C to digest food properly. Chronically low temperatures slow the gut, causing appetite loss and even impaction. Check both ends of the vivarium with digital thermometers before assuming illness.
What are the signs of impaction in a bearded dragon?: According to Vet Help Direct's UK vet team, impaction signs include lethargy, inappetence, bloating and failure to produce faeces. Loose or large-particle substrates such as calci-sand and bark chips are common causes. See an exotic vet promptly.
When should I take a non-eating bearded dragon to the vet?: See a UK-registered exotic vet if your dragon loses weight, refuses food for more than 3–5 days outside brumation, or shows any other sign — sunken eyes, diarrhoea, bloating, breathing changes or weakness. Always rule out illness before assuming brumation.