Hamster falls: first response and the delayed tooth problem

Quick answer

Falls are the most common serious accident in pet hamsters, and the reason is simple: hamsters have almost no sense of height. A hamster will walk off the edge of a hand, a table, a sofa arm or a shoulder without hesitating, because in a burrow system there is nothing to learn from.

The injuries that follow are fractures, head trauma, internal bleeding, and one that owners almost never anticipate. A blow to the face knocks the incisors out of alignment, and misaligned incisors then grow past each other for the rest of the animal's life.

After a fall, the priority is containment and stillness. Repeated handling to check for injuries does more harm than the checking is worth.

• Contain the hamster in a low box on the floor rather than chasing or grabbing it.
• Do not manipulate limbs, straighten anything, or attempt any bandaging.
• Handle only over a surface the hamster can safely land on. This one habit prevents most falls.
• Check the front teeth weekly for at least two months after any impact to the face.
• A hamster that seems fine after a fall still needs watching, and a change in eating or wheel use over the next few days is the sign to act on.

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Never hold a hamster higher than you are willing to let it fall.

A hamster does not judge edges, does not right itself in the air, and moves faster than most people expect. The common scenarios are a hamster carried across a room in cupped hands, a hamster on a child's lap on a sofa, a hamster on a shoulder, and a hamster on a table during cage cleaning.

Every handling session should happen sitting on the floor, or over a bed or sofa with the hamster inside a container, so that the worst outcome is a short drop onto something soft. Transport between rooms happens in a closed container, never in hands.

Hamster balls belong in the same category. They allow a hamster to travel to a staircase, they have poor ventilation, and the hamster has no way to stop or hide. A secure floor pen is the safer option.
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Decide in 60 seconds

Why a short fall does real damage

A hamster weighs very little, so it does not hit the ground hard in absolute terms. The problem is not force, it is that a hamster has no strategy for landing.

Cats twist in the air and spread the impact. Hamsters do not. A falling hamster lands however it happened to be oriented, frequently on the face or on an outstretched limb, and the whole force goes through whatever contacts first.

Three consequences follow from that.

Limb fractures. The tibia and femur most often, because a hamster's limb bones are fine and there is little soft tissue over them.

Facial and dental injury. A face first landing drives the lower incisors against the uppers or knocks one pair sideways. This may cause no visible problem at all on the day.

Head and internal injury. Bleeding inside the skull or the abdomen, neither of which is visible from outside, and both of which develop over hours.

Spinal injury is less common but occurs, particularly when a hamster is dropped from a greater height or lands awkwardly on its back.

The dental consequence, which arrives late

This is the part that catches out both owners and inexperienced clinicians.

A hamster's incisors grow continuously throughout life. They stay at a workable length only because the upper and lower pairs meet and grind against each other every time the animal eats. That is the entire wear mechanism.

If a fall knocks the incisors out of alignment, even slightly, the pairs no longer meet properly. The unopposed teeth keep growing. Within weeks they are too long, and within a couple of months they may curve into the opposite gum, the lip or the roof of the mouth.

The signs are indirect and gradual: eating more slowly, dropping food, preferring soft items, a wet chin, weight loss, pawing at the mouth, and eventually refusing to eat.

Once established, this is managed rather than cured. The teeth need regular trimming by a vet for the rest of the animal's life. It is manageable, and it is much easier to manage from an early stage.

Because of this, the follow up after any facial impact is specific: look at the front teeth once a week for at least two months. Lift the lips gently in good light and check that the uppers and lowers meet squarely and that all four are similar in length and direction. Photograph them so you have a comparison.

Never attempt to trim overgrown incisors yourself with nail clippers. Clipping splits and shatters the tooth lengthwise, causing severe pain and infection of the root. Vets use a burr for exactly this reason.

What to do in the first ten minutes

A low container with a folded towel, prepared on the floor, is the correct transport for an injured hamster.

Do not chase.

A frightened hamster that runs after a fall will keep running, and chasing it causes further injury. Block the escape routes, put a low open container on its side with some food in it, and let the animal go in.

Contain rather than examine.

Put the hamster in a small container with a folded towel or paper towel on the base. Not deep bedding, which a broken limb catches in. Small is correct, because restricting movement is the only field splinting a hamster gets.

Look without handling.

From outside the container, watch how it moves. Is it using all four limbs. Is it dragging anything. Is its head straight. Is it breathing quickly or with effort. Is there blood at the nose or mouth. Is either eye abnormal.

Keep it warm.

A shocked animal this small loses heat quickly. A towel wrapped warm item against the outside of the container, with space for the hamster to move away from it, is right. Never direct heat against the animal.

Do not offer water by syringe.

An injured or dazed hamster inhales fluid easily. Leave water available in a shallow dish it can reach if it wants to.

Do not bandage, splint, straighten or clean anything.

Cover an open wound loosely with a clean dry non-adherent dressing if there is one. That is all.

Phone the vet.

Any fall from above a low height, and any fall with a visible problem, is a same day appointment.

The 72 hours afterwards

Most hamsters that fall look fine within minutes. The monitoring period is what identifies the ones that are not.

Weigh daily.

On a kitchen scale, in a container, at the same time. Weight is the most sensitive indicator available in this species and it falls before behaviour changes.

Watch the wheel.

A hamster that stops running, or runs noticeably less, is telling you something hurts.

Watch the nest.

Nest building requires effort and motivation. A nest that stops being maintained is an early sign.

Check eating properly.

Not by looking at the bowl, since hamsters hoard. Find the cache and see whether it is turning over. Watch the animal eat and note whether it chews normally on both sides and whether it drops food.

Look for delayed neurological signs.

Head tilt, circling, falling to one side, a hind leg that knuckles over, or a change in how it moves through tubes. These can appear hours to days after a head injury.

Check the body for wounds.

Small grazes seal over and abscess. A firm warm lump appearing a few days after a fall is usually an abscess and needs treating.

Check the teeth weekly, as above.

Prevention, which is most of the answer

Handle sitting on the floor, or over a bed or sofa. This single change removes most of the risk.

Move a hamster between rooms in a closed container, never in your hands.

Never carry a hamster on a shoulder, in a pocket or inside clothing.

Supervise children directly, and have them sit on the floor with the hamster in a container on their lap rather than in open hands.

Look at the cage design. Multi level cages with a long drop from the top level onto a hard base cause falls inside the enclosure, particularly in hamsters that climb the bars. Deep substrate underneath, shorter drops between levels, and platforms with edges all reduce it. Bar climbing to the cage roof followed by a fall is a common pattern and is usually a sign the cage is too small or too dull.

Use a secure floor pen with high, smooth, unclimbable sides for out of cage time, rather than a ball.

Check the wheel. A wheel with spokes, mesh or a gap can trap a limb, which produces the same kind of injury without any fall at all.

A note on water

Hamsters can drown, and they should never be bathed in water. A hamster's dense coat holds water against the skin, a wet hamster chills very quickly, and a hamster that has fallen into a sink, a toilet, a garden pond or a fish tank may inhale water.

If that happens, remove the animal, dry it gently with a towel, keep it warm and quiet, and contact a vet. Do not shake it, do not hold it upside down, and do not use a hairdryer. Inhaled water causes lung inflammation that can develop over the following day or two, so a hamster that seems fine still needs veterinary advice.

Coat maintenance in hamsters is done with a sand bath, never with water.

What never to do

Do not splint, tape or bandage a limb.

Do not straighten or pull on a deformed leg.

Do not give any human painkiller. Paracetamol, ibuprofen and aspirin are not safe options for a hamster.

Do not trim overgrown teeth with clippers.

Do not push a protruding eye back into the socket.

Do not use deep loose bedding for an injured hamster.

Do not bathe a hamster in water.

Do not use a hamster ball.

Do not decide to wait until morning for a hamster that is not using a limb, is bleeding, or has stopped eating.

When to get help

Contact an exotics capable vet immediately for a limb that is dragged or held at an abnormal angle, bleeding from the nose or mouth, an eye out of position, a head tilt, difficulty breathing, or a hamster that cannot move normally.

Contact them the same day for any hamster that has fallen from height and is quiet, hunched or off its food, and for any wound however small.

Recovery is a hamster back on the wheel, rebuilding its nest, eating normally and holding its weight.

Book within a week for teeth that have changed alignment, a lump that has appeared at the site of a graze, or a hamster that is eating more slowly than before.

Plain non-adhesive materials for covering a wound loosely. Nothing here is used to splint a hamster's leg at home.

Bring the height of the fall, the surface it landed on, the time it happened, the weight before and after if you have it, the tooth photographs, and a short video of the hamster moving around at home. Hamsters behave differently in a consulting room and the video often shows what the examination cannot.