Buying a healthy snake: the pre-purchase check and the paperwork

Quick answer

Ask to hold the snake before you decide. Muscle tone, grip and how the animal carries its head tell you more in thirty seconds than any description on a label.

Most of the things that go wrong in a snake's first year were already true on the day it was bought. A respiratory infection that was called "just a bit of moisture", a mite infestation that arrived in the box, a feeding record that never existed, or a species that will reach three metres in a flat that has room for one.

The pre-purchase check is a physical examination you can do yourself in a few minutes, plus a set of records you should insist on before money changes hands. Neither requires expertise. Both are routinely skipped, which is why they are worth doing.

• Look at the enclosure the snake is living in before you look at the snake. It predicts more.
• Check for mites under the chin, around the eye rim and in the water bowl, every time, on every animal.
• Ask for the feeding record by date, not a verbal reassurance that it eats well.
• Never buy a snake that has never eaten for the seller, whatever the explanation offered.
• Decide the species from its adult size and lifespan, not its hatchling size and price.

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Never put a newly acquired snake in the same room as snakes you already keep, and never buy one on the day you plan to introduce it.

Snake mites move between enclosures on hands, cloths and air currents, and an infestation that arrives on one animal can take months and repeated treatments to clear from a whole room. Cryptosporidium, which causes chronic regurgitation and mid-body swelling in snakes, has no reliable cure and can end a collection. Quarantine in a separate airspace, with separate tools and hands washed last, is not caution. It is the only thing standing between one new animal and every animal you own.
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Decide in 60 seconds

Why the point of sale is the highest-leverage moment

Every other decision you make about a snake is reversible. You can change the substrate, add a hide, fix the thermostat, adjust humidity. What you cannot change after the fact is which animal you took home and what it was carrying.

Disease travels with the animal, not with the enclosure.

Mites, cryptosporidium, nematode burdens, respiratory infection and inclusion body disease all arrive inside a snake. A perfect setup does not clear any of them. This is why the check happens before purchase and the quarantine happens after, and why doing neither is how most collection-wide problems start.

Feeding behaviour is a trait of the individual, not just the setup.

Some snakes are simply difficult feeders, and some have never learned that a defrosted rodent is food. Ball pythons are particularly known for long voluntary fasts, which makes their feeding record the most informative document in the transaction. A snake with a run of consistent feeds is a different proposition from one with a run of refusals, even if both look identical in the tub.

Species choice sets a twenty-year problem.

Adult size and lifespan are the two facts that determine whether a snake is still in its original home in a decade. A hatchling boa or a young reticulated python is easy to house and easy to sell. The adult is neither. Rehoming pressure for large constrictors is severe in most regions, and the animals that end up in rescues are overwhelmingly the ones that were bought at hatchling size.

Provenance affects everything downstream.

A captive-bred, captive-hatched animal from a keeper who kept records generally settles, feeds and sheds predictably. A wild-caught animal arrives with a parasite load, an unfamiliar prey preference, a history of dehydration and often chronic stress. Ranched animals, incubated from eggs taken from wild gravid females, sit between the two. Sellers do not always distinguish these clearly, so ask directly.

Before you look at any animal

Adult size, adult lifespan, adult food.

Ask what this species measures fully grown, how long it lives, and what size prey an adult takes. Then ask yourself where that enclosure goes and who handles the animal in fifteen years.

Legality, which is regional and not intuitive.

Rules vary enormously. Australia prohibits keeping non-native snakes entirely and requires licences for native species. Several jurisdictions ban specific species or all snakes outright. Some countries and states require a licence for larger constrictors and venomous species. Many popular pet snakes appear on CITES appendices, which affects import, export and sometimes the paperwork you should receive.

Check your own local rules before you travel to view an animal, not afterwards, and ask the seller what documentation comes with it.

Source type, and what each is good at.

A specialist breeder usually offers the best records, the clearest lineage and the most useful advice, and will normally ask you questions in return. A specialist reptile shop offers the chance to inspect the animal and the conditions. A general pet store varies wildly and often houses reptiles by staff who keep none. Expos let you compare many animals quickly but give you no view of how any of them has been housed, and stress levels on the day are high. Courier and online sales remove the physical inspection entirely, which puts all the weight on records and on the seller's reputation.

Look at the enclosure first.

Before you look at the animal, look at where it has been living. Is there a thermostat probe or a bare mat? Is there clean water? Is the substrate soaked or bone dry? Are there two hides? Are several snakes housed together, which for most species means competition and injury risk? Are shed skins left in the tub?

The enclosure tells you what the animal has experienced. A good-looking snake in a bad enclosure is a snake that has not been in that enclosure long enough for the damage to show.

The physical check, head to tail

Ask to handle the animal. A seller who refuses without a reason is telling you something.

How it feels in the hand.

A healthy snake grips. It has firm muscle tone, holds its own weight, and moves with purpose. A snake that hangs limply, that feels doughy, or that cannot support its head is not simply relaxed.

Head posture and neurology.

The head should be carried level and the animal should track its surroundings. Head held upwards and back, an inability to right itself when gently rolled, corkscrewing of the neck, or persistent star-gazing are neurological signs. In boas and pythons these are associated with serious, transmissible disease, and are an immediate walk-away.

Eyes.

Clear and evenly domed, or uniformly cloudy blue if the animal is coming up to a shed, which is normal and temporary. What is not normal is one eye cloudy and one clear, a wrinkled or sunken spectacle, a dented cap, or opaque patches. Retained spectacles from previous sheds sit as dull, slightly raised discs over the eye.

Nostrils.

Clean and open. Crusting, bubbles, dried discharge or a whistling sound are respiratory disease.

Breathing.

Watch the animal at rest for a full minute. Breathing should be quiet and invisible. Open-mouth breathing, a head held raised for long periods, gaping, clicking, wheezing, or a stretched neck posture all point at the respiratory tract. Any of them ends the transaction.

Mouth.

Do not force a snake's mouth open in a shop. If the seller can open it safely and the animal is habituated, look for pale pink to normal-coloured gums, no cheesy yellow material, no reddening along the gum line, no swelling and no stringy or bubbly saliva. Those findings are infectious stomatitis. If nobody can open the mouth safely, the external signs are still informative: swelling along the jaw, an asymmetric jawline, or saliva at the lip margin.

The head check is eyes, nostrils, jawline and breathing, done at rest and without forcing anything. A minute of quiet observation finds more respiratory disease than any handling does.

Mites.

This is the check people skip. Run a finger gently under the chin and along the lower jaw, look into the pits behind and below the eyes, and check the folds where the neck bends. Mites appear as tiny moving specks, usually black or dark red. Look in the water bowl for drowned specks, and at the snake's scales for fine white dust, which is mite waste.

A snake that soaks constantly in its bowl is a snake that may be trying to drown mites.

Skin and scales.

Run the animal through your hands and look along the whole body. You are looking for blisters, weeping areas, brown or reddened patches on the belly scales, which is scale rot from wet substrate, and for shiny, discoloured or contracted patches on the underside, which are healed thermal burns and tell you the source used an unregulated heat mat.

Retained shed shows as dull, papery bands, most often at the tail tip and around the eyes. Retained shed on the tail tip is not cosmetic: a constricting ring can cut off circulation and cost the animal its tail tip.

Snout.

A worn, pink, flattened or raw snout means chronic nose rubbing against glass or mesh. It is a sign of a stressed or escape-driven animal in an unsuitable enclosure, and it takes a long time to heal.

Body condition.

Look at the cross-section. A well-conditioned snake is rounded or gently loaf-shaped. A pronounced ridge along the spine with the sides falling away, giving a triangular profile, means muscle loss. Loose folds of skin along the flanks in a snake that is not mid-shed mean weight has come off recently.

Overweight is also a finding: rolls of fat when the animal bends, and a body that looks segmented.

Kinks, spinal deformity and morph-linked defects.

Run your hand along the spine. Kinks, wobbles when the head is held still, and stargazing behaviour in specific morph lines are inherited problems in some breeding lines. Ask what genes the animal carries and what is known about the line. A breeder who discusses this openly is a better source than one who treats it as an insult.

Vent and tail.

Clean, with no staining, swelling, protruding tissue or retained shed. Ask whether the animal has been sexed and by which method.

The records to insist on

The paperwork is the part of a snake purchase that is most often waved away and most often regretted.

The two documents that matter are a weight and a feeding history, written down with dates. Ask for both, and start your own on the day the animal comes home.

The feeding record.

Dates, prey type, prey size, and whether it was taken or refused. This is the single most valuable thing a seller can give you. It tells you whether the animal feeds reliably, on what, at what interval, and whether there is a pattern of refusals.

Look specifically for whether the snake takes frozen and thawed prey or only live. Switching a live-only feeder is possible but is a project, and you should choose to take it on rather than discover it.

Weight and shed history.

A growth curve and shed dates tell you whether the animal has been thriving or coasting. Regular sheds with lengthening gaps as the animal grows are the expected pattern.

Hatch date and origin.

Captive-bred, captive-hatched, ranched or wild-caught, stated plainly. If a seller is vague about this, treat the animal as wild-caught for planning purposes: quarantine longer, get a faecal test, and expect a slower settling period.

Lineage and genetics.

For morph animals, which visual and heterozygous genes the animal carries, and what is known about the line's health. Some combinations are associated with neurological signs and some are not viable, so this is a health question.

Any regulatory documentation.

Permits, licences, CITES paperwork or microchip records where your region or the species requires them. Get the species name in Latin on the receipt, not just a trade name.

The health guarantee, read rather than assumed.

Ask what it covers, for how long, and what it requires from you. Many guarantees are void if the animal is not seen by a vet within a short window, which is a reason to book that appointment before you collect the animal rather than after.

Questions worth asking, and what the answers mean

"When did it last eat, and what?" A specific answer with a date is good. A vague "it eats fine" is not an answer.

"Is it feeding on frozen and thawed?" This determines your next six months.

"Has it ever regurgitated?" Regurgitation history matters because chronic regurgitation is the presenting sign of cryptosporidium, which has no reliable cure.

"How is it heated and what does the hot spot measure?" A seller who has measured surface temperature with a probe keeps snakes properly. One who names a wattage does not.

"Has it been housed with other snakes?" Cohabitation raises the risk of both mites and injury, and means a mite finding on one animal implicates all of them.

"Is it wild-caught, ranched, or captive-bred?"

"Can I see it eat?" Occasionally possible at a breeder, and worth far more than any verbal assurance.

"What would you do if it stopped feeding for me?" The quality of the answer tells you whether you are buying from someone who will still take your call in a month.

Bringing it home

Transport in a cloth bag inside a rigid, ventilated, secured container, kept at a stable moderate temperature. Cold is the common failure in winter and overheating is the common failure in a car in summer. Never leave the container in direct sun or in a boot for hours.

Set the enclosure up and run it for days before collection, with the thermostat verified by a separate thermometer at the surface the snake will lie on. A snake introduced to an enclosure that is still being tuned is a snake being asked to settle in a moving environment.

A plain quarantine tub with paper substrate, a hide and a water bowl beats a decorated display enclosure for the first weeks. Mites and droppings are visible on paper and invisible in bark chips.

Quarantine in a separate room, on plain paper substrate, with its own tools, hides and bowl. Paper is deliberate: it lets you see mites, blood, unusual droppings and shed quality that bark or aspen would hide.

Handle the new animal last, wash hands afterwards, and change clothing before touching an established collection.

Book a health check and a faecal test with a reptile-experienced vet within the first weeks, and keep the animal in quarantine until you have the result. If the animal is wild-caught or of unclear origin, extend the quarantine considerably.

Do not offer food immediately. Give the animal time to settle first, and record the first feed as the first line of your own feeding log.

What never to do

Never buy a snake out of pity. A visibly sick animal in a poor shop does not stop the shop selling animals, and you will have paid for a veterinary problem and imported it into your home.

Never buy an animal that has never fed for the seller. The explanation is always plausible and the outcome is usually a long, expensive assist-feeding project.

Never skip quarantine because the animal came from a good breeder. Good breeders have mite outbreaks too, and quarantine costs you a few weeks against a risk measured in whole collections.

Never house a new snake in a display enclosure with loose substrate during quarantine.

Never take a verbal feeding history in place of dates. Memory is generous.

Never buy a species you have not checked the legality of in your own region, and never assume that legality where the seller lives means legality where you live.

Never let a seller talk you out of the mite check.

When to get help

Book a reptile-experienced vet within the first weeks of any purchase, before the animal leaves quarantine, and ask for a faecal test. For a wild-caught or unclear-origin animal, ask specifically what parasite testing is included.

Contact a vet the same day, at any point, for any of these:

• Open-mouth breathing, bubbling at the nostrils, or audible breathing
• Refusal to feed accompanied by weight loss, rather than refusal alone
• Regurgitation, particularly more than once
• Any swelling along the body or the jaw
• Inability to right itself, or a head held raised and back
• Blistering, weeping or spreading discolouration of the belly scales

Bring the feeding record, the weight log, the shed dates, photographs of anything intermittent, the measured hot and cool temperatures, and the animal's origin. If mites are the question, bring the shed skin and, if you can, a piece of the substrate in a sealed bag.

If you keep other snakes and a new arrival is diagnosed with mites or with cryptosporidium, ask the vet about the whole room, not just the animal in front of them. Treating one enclosure while the others share tools, hands and air is the reason these problems recur for months.