EN·DE·FR·ES

Is this normal? Reptile behaviour & appetite

The most common worry in the hobby: is what my reptile is doing normal, or a problem? Here are the signs keepers ask about most, what's usually fine, what to watch, and the clear line for calling a vet.

Not eating / gone off food Only wants one feeder (e.g. superworms)Hiding constantly / won't come out Losing weight Lethargic / sluggish (or brumating?)Stuck or incomplete shed Glass surfing (climbing at the glass)Digging a lot Regurgitation / bringing food back up Wobbling, tremors or star-gazing Gaping, wheezing or mucus (breathing)Soft jaw, bent limbs or trouble walking

Not eating / gone off food

Depends

Often just

A recent move, new home or rehome, most reptiles fast for days to weeks while they settle in.
Cooler months: many species (leopard geckos, some snakes, Mediterranean tortoises) naturally slow down or brumate and eat far less.
A shed on the way, lots of species go off food for a few days around a shed.
A gravid or ovulating female often stops eating for a couple of weeks, common in female leopard geckos even with no male present.
Temperatures too low: a cool basking or warm spot quietly switches off appetite, so check temps before anything else.

Watch for

Weight dropping alongside the fast, not just a pause.
Weeks of refusal outside a normal seasonal or breeding window.
Refusal with lethargy, sunken eyes or hiding away.

See a vet if

The animal is losing weight, looks unwell, or a healthy adult refuses food well beyond its normal seasonal window. Always rule out low temperatures first.

Try this: Check the warm-spot and cool-side temperatures with a real thermometer before worrying, cold is the number-one appetite killer.

Only wants one feeder (e.g. superworms)

Often normal

Often just

Feeder 'addiction' is common and behavioural: rich, fatty feeders like superworms and waxworms are the reptile equivalent of sweets, so animals hold out for them.
In a lively, healthy animal that's still eating, this is a preference problem, not an illness.

Watch for

Refusing everything, not just holding out for a favourite, which is loss of appetite, not pickiness.
Weight loss while being fussy.

See a vet if

It stops eating altogether or loses weight. Picky-but-eating is a husbandry fix, not usually a medical one.

Try this: Offer only the staple feeder (appropriately sized crickets or dubia) and skip the treat feeder, a healthy reptile takes the staple within a few days to a couple of weeks. Don't cave and feed the junk.

Hiding constantly / won't come out

Often normal

Often just

Brand-new animals need a settling-in period, often one to two weeks, where they hide and only emerge to feed. Eating well but staying hidden is a good sign, not a bad one.
Nocturnal and crepuscular species (leopard geckos, many snakes) hide by day by design, you're often just watching at the wrong hours.
Too little cover makes a reptile feel exposed; more hides on both the warm and cool ends usually settles it.

Watch for

Hiding plus not eating or losing weight.
Always jammed onto the hottest or coldest spot, which can mean the temperatures are wrong.

See a vet if

Hiding comes with appetite loss, weight loss or other symptoms, rather than a settled animal that simply likes its hide.

Try this: Give it two quiet weeks with minimal handling, correct temperatures and plenty of hides. If it's eating, it's almost always just settling in.

Losing weight

Depends

Often just

A small dip after a move, a shed or a breeding-season fast can be normal.

Watch for

A steady downward trend across several weigh-ins.
A thinning tail base (leopard and fat-tailed geckos store fat there) or visible hip and spine bones.
Weight loss with runny or abnormal droppings, which can point to parasites.

See a vet if

Weight trends down over two to three weigh-ins, the tail base or body looks thin, or droppings look abnormal. Bring a recent weight log and, if asked, a fresh faecal sample.

Try this: Weigh on the same scale on a set schedule, a trend over time matters far more than any single reading.

Lethargic / sluggish (or brumating?)

Depends

Often just

In cooler months many temperate species (leopard geckos, some snakes, Mediterranean tortoises) naturally slow right down. This is brumation and can look alarming while being healthy.
A cool enclosure at any time of year makes a reptile sluggish, check the warm spot before assuming illness.

Watch for

Lethargy plus not eating and losing weight, the classic illness pattern, not healthy brumation.
Weakness alongside gaping, mucus or a wobble, which is urgent.

See a vet if

A sluggish animal is also losing weight or has other symptoms, or the 'brumation' happens at warm temperatures with no seasonal cue. Healthy brumation keeps weight stable.

Stuck or incomplete shed

Depends

Often just

The usual cause is humidity too low. Retained shed on toes, the tail tip and around the eyes is the giveaway.

Watch for

Rings of stuck shed on toes or the tail tip, which can cut off circulation and cost a digit.
Retained eye caps or repeated bad sheds.

See a vet if

Shed is stuck around the eyes, or a constricting band won't come off after a gentle warm soak. Don't force or pull it.

Try this: Raise humidity, add a humid hide, and offer a shallow warm soak. Never peel shed off dry skin.

Glass surfing (climbing at the glass)

Depends

Often just

Often a request for something: an enclosure that's too small or bare, temperatures that are off, or new-tank stress.
Some individuals do it briefly after a move, then settle.

Watch for

Persistent, frantic glass surfing, which usually means a husbandry problem to fix rather than a happy explorer.

See a vet if

Rarely a vet issue by itself, but persistent stress can dent appetite and health. Review temperatures, enclosure size, cover and reflections first.

Try this: Check temps, add hides and clutter, confirm the enclosure is big enough, and cut down reflection and foot traffic past the glass.

Digging a lot

Depends

Often just

A gravid (egg-carrying) female digging test holes is normal nesting, common in female leopard geckos and many lizards even without a male.
Digging to reach a cooler, more humid layer can mean the warm spot is too hot or the setup too dry.
Some species simply burrow as natural behaviour.

Watch for

Frantic, non-stop digging in a female that's also off food and restless, which can mean she's gravid and needs a lay box, or is egg-bound if she can't pass eggs.

See a vet if

A gravid female strains or stays restless a long time without laying (possible egg-binding), or digging comes with signs of illness.

Try this: For a gravid female, add a humid lay box (moist substrate she can dig into). Otherwise, check whether the temperatures are driving her to dig for relief.

Regurgitation / bringing food back up

Depends

Often just

The common husbandry causes are handling too soon after a meal, or temperatures too low to digest, snakes especially regurgitate if cool or disturbed after eating.
A meal that was simply too large can also come back up.

Watch for

Repeated regurgitation, or vomiting with lethargy and weight loss, which can mean parasites, infection or a blockage.

See a vet if

Regurgitation happens more than once, or comes with other symptoms. After a single episode, fix temperatures and wait before offering a smaller meal.

Try this: Don't handle for about 48 hours after feeding, and make sure the warm end is genuinely warm enough to digest.

Wobbling, tremors or star-gazing

Take seriously

Often just

Not usually benign. Tremors or a wobble when walking can indicate metabolic bone disease (MBD) from a lack of UVB or calcium, especially in young, fast-growing animals.
Star-gazing, circling or head tilts are neurological signs; in some leopard gecko lines, 'Enigma syndrome' causes balance problems.

Watch for

Any tremor, wobble, circling, star-gazing, or a soft or bent jaw and limbs.

See a vet if

Promptly. Neurological signs and suspected MBD both warrant a reptile vet, and MBD is far easier to arrest early. Meanwhile, verify UVB and calcium/D3.

Gaping, wheezing or mucus (breathing)

Take seriously

Often just

Some basking lizards (like bearded dragons) gape to cool down under a hot spot, which is normal thermoregulation.

Watch for

Open-mouth breathing away from basking, especially with mucus, bubbles, wheezing, clicking or puffing.
Cold, damp conditions, the usual trigger, and common in tortoises kept too cold.

See a vet if

Promptly, if there's mucus, noisy or laboured breathing, or open-mouth breathing that isn't just basking. Respiratory infections need veterinary treatment plus warm, dry, correct husbandry.

Soft jaw, bent limbs or trouble walking

Take seriously

Often just

Not benign. A rubbery jaw, bowed or swollen limbs, a soft or lumpy shell, or trouble lifting the body off the ground are classic signs of metabolic bone disease from inadequate UVB, calcium or D3.

Watch for

Any of these signs, especially in a young, growing animal, MBD is progressive.

See a vet if

Yes, see a reptile vet. MBD is treatable, especially early, and you'll want to correct UVB and calcium/D3 straight away alongside treatment.

General guidance, not veterinary advice, and no substitute for examining the animal. Signs overlap between species and conditions, so when in doubt, or when anything is marked take seriously, contact an experienced reptile vet.

This is exactly what baskr does, automatically.

Log feeding, weight, sheds and temperatures, and baskr watches the pattern across time, telling a normal seasonal dip apart from a trend worth acting on, before it becomes a problem.

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