The first 72 hours with a new reptile

Quick answer

The first three days with a new reptile are about doing almost nothing. No handling, no expectation of a meal, no rearranging, no showing it to visitors. The animal has just been caught, boxed, transported and released into an environment it has never seen.

What you do instead is verify the equipment, record a baseline, watch from outside the glass, and keep the animal completely separate from any reptile you already own.

The enclosure should have been running and holding temperature for days before the animal arrives, not from the moment it does.

• Set the enclosure up and run it for several days before collection, and confirm the temperatures with a probe.
• Transfer the animal in, close the lid, and then leave it alone.
• Refusing food in the first days is normal for almost every reptile. Refusing water is not.
• Quarantine every new reptile away from your existing animals, with separate equipment.
• Weigh the animal on day one. That number is the reference point for everything that follows.

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Never put a new reptile into an enclosure with an animal you already keep.

Mites, respiratory pathogens and internal parasites travel with new arrivals, and several of them can wipe out an established collection. Some infections are carried by an animal that looks entirely healthy for months. A new reptile goes in its own enclosure, ideally in a separate room, with its own tools and water bowl, and it is serviced last after every other animal.
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Decide in 60 seconds

Before the animal arrives

The single biggest determinant of how the first 72 hours go is what you did in the week before them.

Run the enclosure for several days empty.

Heating and lighting equipment needs time to stabilise, and thermostats need adjusting more than once. Log the temperatures across a full day and night cycle before the animal is anywhere near it.

Verify with a probe, not with the box.

The wattage printed on a lamp tells you nothing about the temperature at the basking surface in your room. Use a digital probe thermometer for ambient at both ends, and check surface temperatures at the basking site.

Get the species figures from a species-specific source.

Temperature and humidity ranges differ enormously between reptiles. Write your target numbers on the enclosure so you are checking against something rather than guessing.

Check the lid, the locks and every gap.

A newly arrived animal will explore the boundary systematically. Vents, cable ports and sliding doors are the usual escape routes.

Ask the seller the right questions before collection.

Date and content of the last meal, the last shed, the substrate and temperatures used, the hatch date or approximate age, whether the animal is captive-bred or wild-caught, and whether it has ever been treated for anything.

Wild-caught origin changes the plan. Those animals carry higher parasite loads and are more likely to need a veterinary faecal screen early.

Hour zero: the arrival

Go straight home. Do not run other errands with a reptile in the car, and do not leave the box in a parked vehicle for any length of time.

Open the transport container inside the closed enclosure or inside a closed room, and let the animal move out on its own rather than tipping it out.

Weigh it. This is the one thing worth handling for, and it takes seconds. A digital kitchen or postal scale and a container that the animal can sit in is enough. Write the number down with the date.

Put fresh, clean water in immediately, in a bowl the animal can reach and get out of easily.

Then close the enclosure and walk away. Leave the lights on their normal cycle, keep the room quiet, and resist the urge to check every twenty minutes.

Day one to day three: what you are watching for

You are looking from outside the glass, briefly and quietly, several times a day.

Where it chooses to be.

An animal that settles in the hide on the warm side is thermoregulating normally. One that sits permanently at the cool end, or permanently pressed against the heat, is telling you the gradient is wrong.

Whether it drinks.

Some species drink from a bowl, some only from droplets, and some absorb water while soaking. Know which yours is, and watch the water level.

Breathing.

Reptiles are silent. Any clicking, wheezing, gaping or a stretched neck with each breath is a same-day veterinary matter, and respiratory infection is one of the commonest things to appear in a newly moved animal that has been chilled.

The skin, eyes and mouth.

Sunken eyes and skin that stays wrinkled point to dehydration. Retained shed or stuck eye caps point to conditions before you got it. Any discharge or discolouration around the mouth needs a vet.

Droppings.

The first droppings tell you a lot, and they are also what a vet needs for a parasite screen. Keep the first fresh one in a clean sealed bag in the fridge if an appointment is booked.

Mites.

Look in the water bowl, under the chin scales, around the eyes and in any heat pits. Tiny moving black or red specks, or a dusty residue on your hands after handling, mean mites. They spread through a collection quickly.

Settled posture, using the furniture, alert but not braced. This is what you are hoping to see by the end of the third day.

Quarantine, properly done

Quarantine is not a shelf in the same room. It is a separate space with separate equipment.

Paper towel rather than a naturalistic substrate is deliberate. It makes droppings, blood, mucus, mites and shed fragments immediately visible, and it can be thrown away rather than sterilised.

How long quarantine lasts is a veterinary judgement rather than a fixed rule. It is measured in months rather than weeks, and it is longer for wild-caught animals. Ask your reptile vet to set the period for your specific animal.

What normal settling looks like

Hiding for most of the first days. This is the correct response to a new environment and not a sign of illness.

No interest in food. Depending on the species, a new arrival may not eat for a considerable time, and pushing it makes that longer rather than shorter.

Activity at the species' normal hours, which for many commonly kept reptiles means at dawn, dusk or overnight rather than while you are watching.

Some exploration of the boundary, especially in the first days, tapering off as the animal accepts the space.

What is not normal settling: refusing to drink at all, staying cold and inactive when the gradient is correct, laboured breathing, weight dropping quickly, or an animal that never moves from one spot over several days.

What never to do

Do not handle in the first 72 hours except to weigh, and keep even that to seconds.

Do not introduce the new animal to another reptile, in either direction, for any length of time.

Do not offer a meal on arrival day, and do not keep re-offering after a refusal. Repeated presentation adds stress.

Do not rearrange the enclosure once the animal is in it. Let it learn one layout.

Do not use the new arrival as the reason to try a new substrate, a new lamp, or a new diet. Change one thing at a time, and not in the first week.

Do not skip quarantine because the animal came from a good breeder or a clean shop. Mites and parasites do not read reputations.

Do not treat for parasites or mites on your own judgement. Several products sold for reptiles are unsafe or ineffective, and treatment needs to be matched to the actual organism.

When to get help

Contact a reptile vet the same day for open-mouth breathing, any noise on breathing, nasal or mouth discharge, sunken eyes with wrinkled skin, tissue protruding from the vent, or an animal that is cold and unresponsive.

Contact one this week for mites, retained shed or eye caps, visible weight loss, or a refusal to drink at all.

Book a routine new-animal examination regardless, with a fresh dropping sample, and take your log with you.

The first accepted meal is the milestone worth waiting for. Offering it too early is what usually delays it.

Bring the species, the age or hatch date, whether the animal is captive-bred or wild-caught, the seller's information about diet and last feeding, your logged temperatures and humidity, the arrival weight, and a fresh dropping. That set answers most of what a reptile vet needs to know about a new animal.