Fall trauma and fractures in dormice
The dormouse (Glis glis) is a small climbing rodent, active at night and very skilled at jumping between branches. This natural agility does not prevent it from falling, especially when kept in captivity in a poorly designed cage, or during...
What is it?
The dormouse (Glis glis) is a small climbing rodent, active at night and very skilled at jumping between branches. This natural agility does not prevent it from falling, especially when kept in captivity in a poorly designed cage, or during escape attempts.
A fall, even from a low height compared to a large animal, can cause fractures of the limbs, tail, pelvis or spine in this small, light body, as well as internal trauma.
This sheet describes fall trauma and resulting fractures in dormice, a frequent reason for consultation in new pet medicine (NAC).
Key point
Fall trauma in an animal as small and fragile as the dormouse should always be considered a potential emergency, even if the signs seem discreet at first.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
After a fall, the dormouse may limp or refuse to use a limb.
He may remain prostrate, motionless, curled up in a corner of his cage or nest.
Sometimes we observe an abnormal limb hanging, an odd position of the tail, or localized swelling.
The animal may refuse all food, breathe difficult if there is chest trauma, or show a loss of balance if the head or spine is affected.
In the most serious cases, partial or total paralysis of the hind legs may appear, a possible sign of spinal cord injury.
Since the dormouse is an animal that hibernates, you must be vigilant: an animal simply numbed by the cold can resemble a traumatized animal, hence the importance of a veterinary examination to tell the difference.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
The direct cause is a shock linked to a fall: falling from a height from a shelf, an outdoor tree, or the inside of a poorly secured cage.
Fractures occur when the force of the impact exceeds the strength of the bone, often in the long bones of the legs, the tail (fragile and easily breakable in this rodent) or the pelvis.
Associated trauma can affect internal organs (thorax, abdomen) even without visible fracture.
Poorly designed cage or aviary, with high levels and few elements to cushion a fall.
Absence of thick litter or soft substrate on the floor of the enclosure.
Rough handling or dropping of a person's hands when handling the animal.
Open cage allowing an escape followed by an accidental fall in the house (stairs, tall furniture).
Young age or otherwise weakened animal (illness, exit from hibernation), more fragile in the face of shock.
Osteoporosis or bone fragility linked to an unbalanced diet lacking in calcium, common in poorly nourished rodents.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
The veterinarian begins with a general clinical examination, looking for pain, swelling, deformation or abnormal mobility of a limb.
He also assesses the state of shock, breathing and the possible presence of neurological signs (reflexes, sensitivity).
X-rays are often necessary to confirm a fracture, specify its exact location and choose the treatment best suited to the size of this small animal.
In some cases, an ultrasound or other additional examinations can be used to look for associated internal lesions.
Treatment
Management depends on the severity and location of the lesion.
It can combine analgesics to relieve pain, strict rest in a small and secure space, and external immobilization (bandage, splint) for certain simple fractures.
More complex or unstable fractures may require surgical intervention with placement of osteosynthesis material, carried out by a veterinarian experienced in surgery of small exotic mammals.
Nutritional support and rehydration can be combined in the event of a shocked animal or one that has stopped eating.
Post-treatment follow-up often includes x-ray checks to check good bone union.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Arrange the cage with levels that are not too high, strong and well-fixed branches, and thick shock-absorbing litter.
Avoid letting the dormouse go out unsupervised in a room where there is a risk of falling (high furniture, stairs).
Handle the animal gently, at a low height above a soft surface, and avoid sudden movements.
Ensure a balanced diet, including a correct intake of calcium and vitamin D, to limit bone fragility.
Regularly check the solidity of the cage fittings (branches, platforms, hammocks).
Possible complications
A poorly treated fracture can lead to vicious consolidation, permanent lameness or loss of limb function.
Trauma to the spine can cause permanent paralysis of the hind legs.
Immobilization for too long in a fragile animal promotes amyotrophy (muscle wasting) and bedsores.
Internal injuries not detected in time (hemorrhage, organ perforation) can be life-threatening.
The stress associated with handling and hospitalization can worsen the general condition of an animal as sensitive as the dormouse.
When to see a veterinarian
The dormouse limps, refuses to use a leg or drags a limb after a fall.
A limb or tail has an abnormal position or visible swelling.
The animal remains prostrate, no longer eats or no longer moves since the fall.
Signs of paralysis of the hind legs appear.
The animal has difficulty breathing or appears to be in shock after the trauma.
A doubt exists between a state of numbness linked to hibernation and a real trauma.
Prognosis
The prognosis depends greatly on the severity of the fracture and the speed of treatment.
A simple fracture of a limb, properly treated, can progress favorably with good functional recovery.
Complex fractures, spinal trauma or associated internal injuries worsen the prognosis.
The small size of the dormouse makes certain surgical procedures delicate, which can limit therapeutic options in the most severe cases.
Frequently asked questions
My dormouse had a small fall but seems normal, should I still consult?
Even a seemingly minor fall can cause internal injuries or a fracture that is barely visible at first. It is prudent to closely monitor the animal in the following hours and consult if abnormal behavior appears (immobility, refusal to eat, lameness).
How to differentiate a hibernating dormouse from a traumatized one?
This is sometimes difficult because both conditions can result in a very immobile animal. The context of the fall, the presence of swelling or deformation, and a veterinary examination make it possible to safely tell the difference.
Can a fracture in such a small animal be operated on?
Yes, some fractures can be treated surgically by a veterinarian experienced in NAC, but the small size of the dormouse technically complicates the intervention. The choice between surgical treatment and external immobilization depends on the type of fracture.
How can I prevent my dormouse from falling into its cage?
It is necessary to set levels that are not too high, securely fix branches and platforms, and put thick litter on the ground to cushion a possible fall.
References
AVMA — American Veterinary Medical Association
WSAVA — World Small Animal Veterinary Association
Content reviewed by the TunisieVet editorial team · Updated 18 August 2026
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