Assist feeding a lizard: when it helps, when it harms, and the safe method

Quick answer

Before you assist feed anything, make sure the animal is warm enough to digest what you give it. Food in a cold reptile does not move, and food that does not move rots.

Assist feeding is the step people reach for first and should reach for last. A lizard that is not eating usually needs its temperature, its hydration and its diagnosis corrected before it needs food pushed into it, and doing it in the wrong order causes regurgitation, aspiration pneumonia and gut stasis.

There is also a specific hierarchy of harm. Putting food into a cold lizard, a dehydrated lizard, an obstructed lizard or one that is already regurgitating makes each of those situations worse, sometimes fatally.

• Correct temperature first. A reptile below its preferred range cannot digest and cannot mount an immune response.
• Correct hydration second. Rehydrating before feeding is standard, and a dehydrated animal handles a protein load badly.
• Get a diagnosis third. Appetite loss is a sign, not a disease, and in an older lizard it is frequently dental, renal or reproductive.
• Only then consider calories, starting with tempting and hand offering, not with a syringe.
• Stomach tubing is a technique to be taught hands on by a vet, not learned from any written guide.

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Never assist feed a lizard that is cold, dehydrated, regurgitating, straining, or that has a prolapse or a suspected obstruction.

Reptile digestion depends entirely on body temperature. Food placed in a cold gut sits there, ferments and produces bacteria and gas, and the animal deteriorates faster than it would have without the meal. A dehydrated reptile diverts water into digestion that it needs elsewhere. And a lizard with a blockage that is being fed is being loaded above the obstruction. If any of these apply, the next step is a reptile vet, not a syringe.
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Decide in 60 seconds

Why appetite falls in an older lizard

Dental and jaw disease. In agamids and chamaeleonids the teeth are fused to the jaw margin and are not replaced. Plaque, gingival recession and bone loss along the jaw are common in older captive animals fed soft diets, and they are painful. The lizard eats less, chews on one side, drops food, or takes food and spits it out.

Renal disease and gout. Common in reptiles kept dry, kept warm and fed a high protein diet over years. It presents as reduced appetite, weight loss, lethargy, thick chalky urates and sometimes swollen joints.

Hepatic lipidosis. Overweight lizards that then stop eating mobilise fat into a liver that handles it poorly. This is why an obese lizard going off food is more urgent than a lean one doing the same.

Metabolic bone disease. Softened jaw bones, a rubbery lower jaw, tremors and difficulty grasping food. Long standing cases in older animals may have permanent jaw deformity.

Reproductive disease. Follicular stasis and retained eggs in females produce appetite loss with abdominal swelling and restlessness, and are surgical problems.

Vision loss. Cataracts and other ocular problems make a lizard that hunts by sight miss its prey, which looks like disinterest.

Arthritis and spinal change. An older animal that cannot climb to its basking site does not get warm enough to want to eat.

Tumours and organ disease. Non specific weight loss and appetite decline.

Husbandry drift. The commonest cause of all. A UVB lamp that has aged past its useful output, a thermostat that has crept, a basking bulb that is weaker than it was, a room that got colder in winter. Always check the equipment before you conclude that the animal has aged.

Step one: heat and light before food

Measure, do not assume. Use an infrared thermometer for surface temperatures and a probe for ambient, and check the basking surface, the warm end air, the cool end and the night time low.

A lizard below its species range digests slowly or not at all, so offering food achieves nothing and can cause harm. It also cannot fight infection, which is why so many reptile illnesses trace back to a heating fault.

Check UVB provision at the same time. Output falls long before a lamp stops emitting visible light, and the replacement interval matters more than the appearance of the bulb. Note the date on the fitting.

Check the photoperiod. Many species reduce or stop eating with a shortening day length, and if your lighting is on a timer that changed, or the room gets natural light through a window, the animal may be responding to season rather than to illness.

Step two: water before calories

Weigh on the same scale, at the same time of day, and write it down. Weight trend is the number that decides whether appetite loss is a problem, and memory is not a substitute for a log.

Signs of dehydration in a lizard include sunken eyes, skin that stays tented when gently lifted, a sticky or stringy mouth, wrinkled or retained skin, and urates that are thick, chalky and yellow rather than soft and white.

A warm shallow soak in water the animal can stand in without swimming is the standard first measure for most terrestrial species, supervised throughout. Species that do not drink from standing water, including most chameleons and many arboreal geckos, need droplets on foliage, a dripper or a misting system instead.

If the animal is significantly dehydrated, fluids given by a vet under the skin or into the body cavity work far faster and more reliably than anything oral, and they are the appropriate step before any feeding.

Do not give sports drinks, fruit juice or human oral rehydration products unless a reptile vet has told you to. Concentrations designed for a mammal are wrong for a reptile.

Step three: tempting, before syringes

Texture, movement and smell all change whether a reluctant lizard takes food. Try the preferred item, at the preferred temperature, at the time of day the animal normally hunts.

Offer the right thing at the right time. Diurnal species eat when warm and after basking. Crepuscular geckos eat at dusk. Offering a bearded dragon salad in the evening or a leopard gecko insects at midday produces refusals that mean nothing.

Use movement. Sight hunters respond to live prey moving. A dish of dead insects is invisible to some species.

Use smell and warmth. Warming food to body temperature makes it more attractive to species that use scent, and a strong smelling item can trigger a response where a bland one does not.

Offer in the animal's preferred place. Some lizards will not feed in the open. Offering inside a hide or from tongs at the hide entrance works when a dish does not.

Reduce disturbance. A stressed lizard does not eat. New enclosure, new housemate, a dog barking, an enclosure in a busy room, or being handled daily all suppress appetite.

Smear a small amount on the snout. Many lizards will lick a slurry off their own nose when they will not take it from a syringe. This is the gentlest form of assisted feeding and it should be tried before anything more forceful.

Step four: syringe feeding, done correctly

This is a technique with genuine risks, and it should be started under veterinary instruction with a demonstration on your own animal.

Warm the lizard to its preferred temperature first, and keep it warm throughout and afterwards.

Use an appropriate formula. Commercial critical care products exist for carnivorous and insectivorous reptiles and separately for herbivorous ones. Use the right one. A herbivorous lizard given a meat based recovery diet is being loaded with protein its kidneys do not want, and a carnivore given a plant formula gets little of what it needs. Do not use human baby food, which is the wrong nutrient balance and may contain onion and garlic.

Mix to a consistency that flows through the syringe without needing pressure. If you have to force the plunger, it is too thick.

Support the whole body, head slightly above the level of the body, never head down, and never dangling by the trunk.

Open the mouth gently and correctly. Use a soft plastic card, a rubber spatula or a purpose made speculum introduced at the side of the mouth. Never use metal, never lever against the teeth, and never force a jaw. In species with teeth fused to the jaw bone, prying against the teeth breaks them off permanently.

Deliver small volumes onto the middle of the tongue and allow the lizard to swallow between each one. Watch the throat move. Do not squirt toward the back of the throat.

Watch the glottis. It sits at the base of the tongue, visible as a small slit, and it is normally closed. Any bubbling, coughing, gasping or fluid at the nostrils means stop immediately.

Small and frequent beats large and occasional, particularly in an animal that has been anorexic for a while.

Stop at any resistance. A lizard that is fighting hard is at risk of aspiration and of injury from restraint. Put it back, let it settle, and speak to your vet.

Never attempt stomach tubing at home unless a vet has trained you on your specific animal. Passing a tube into the trachea instead of the oesophagus kills.

Refeeding an animal that has been off food a long time

Reintroducing nutrition to a starved animal causes shifts in blood electrolytes as the body switches back to using carbohydrate, and pushed too hard this is dangerous in its own right. The principle is small volumes, frequent, building gradually over days rather than replacing a full ration on day one.

Expect the first droppings to be delayed and unusual. Track weight rather than volume fed. And treat any regurgitation as a signal to stop and reassess, not to try again with more.

What the vet will want

What never to do

Never assist feed a cold lizard.

Never force the mouth open with anything metal, and never lever against the teeth.

Never hold a lizard head down while feeding.

Never use a human oral rehydration product, sports drink or baby food unless specifically directed.

Never pass a stomach tube without hands on training.

Never continue if the animal coughs, bubbles, or produces fluid at the nostrils.

Never assume a long fast is safe because reptiles are slow. A lean animal that is losing condition is not doing something normal.

Never treat appetite loss with food alone. It is a sign, and the underlying cause continues regardless of what you put in the stomach.

When to get help

Book a veterinary appointment for any lizard losing body condition, for appetite loss outside a normal seasonal fast, for drooling or difficulty eating, and for thick chalky urates.

Go the same day for straining, a swollen abdomen, a prolapse, repeated regurgitation, or an animal that cannot right itself.

Go immediately for coughing, bubbling, gasping or nasal discharge after any feeding attempt, because aspiration pneumonia in a reptile is severe and progresses.

Take your logs and your photographs. In reptile medicine the husbandry history usually identifies the cause faster than examining the animal does.

Recovery is a lizard that takes food on its own again, in its own time, at the right temperature. Assisted feeding is a bridge to that, never the destination.