What actually breaks in a rabbit: 210 fractures reviewed
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
People readily protect a rabbit’s legs when carrying it, fearing a fall above all. A study published in 2015 by Sasai, Fujita, Tagami and colleagues in JAVMA reviewed the records of 210 pet rabbits presented for fracture between 2007 and 2013, and the ranking it produced shifts the focus (see the study, doi 10.2460/javma.246.12.1339). Our other guidance is gathered in the rabbit travel and safety section.
Contents · 6 sections
The spine ahead of the limbs
Among fractures with no tumour cause, vertebral fracture is the most common type, with 46 cases, and it concentrates in the lumbar region from L4 to L7 — that is, the lower back, just ahead of the pelvis. The tibia comes next as the most frequent limb fracture site, with 45 cases. Beware of the comparison, though: “vertebral fracture” pools every level of the spine, whereas the tibia is only one bone among those of the limbs. The ranking does not say that the spine breaks more often than the legs as a whole; it says that the vertebral axis, almost always forgotten when handling a rabbit, comes top of the fracture types taken one by one — and that it gives way in exactly the zone where the forces of a kick or a sudden thrust of the hindquarters concentrate.
Nearly half the cases are under three years old
Nearly half the cases, 95 to be exact, or 47.7%, involved rabbits under three years old. The figure surprises if you associate fractures with the bone fragility of old age, but it has to be read for what it is: the study counts only animals that had already fractured, with nothing known about the age structure of the source population of rabbits — and pet rabbits are mostly young. So it cannot be concluded that a young rabbit fractures more often than an old one. What the figure does establish is that a fracture is in no way an old rabbit’s condition. The most frequently identified cause is accidental falls — the study puts no figure on it and does not distinguish between a fall from someone’s arms, a fall from furniture and a panic movement in a cage.
One fracture in eighteen revealed a tumour
Twelve of the 210 fractures, or 5.7%, had a tumour rather than a traumatic cause. Seven of those were associated with metastases from a uterine adenocarcinoma, and females were significantly more likely than males to present with a fracture of tumour origin. The signal matters even though it rests on few animals: in an unspayed doe, a bone that gives way without proportionate trauma is not merely an accident, it is a reason to look further.
What the study does not show
This is not a prevalence: it describes the composition of a population of rabbits that had already fractured, presented at Japanese facilities equipped with a micro-CT scanner, which introduces a recruitment and imaging bias. It establishes no causal link with any particular handling method, and compares no carrying technique. Nor does it say what proportion of fractures occur at home rather than during handling.
What this changes for carrying your rabbit
If the most exposed zone is the lower back, then supporting the hindquarters is not a comfort detail but the central precaution: a rabbit held under the chest and left free to kick concentrates all the force on its lumbar spine, with no fall required. Height matters too, all the more with a lively young animal. Our guide on handling and carrying a rabbit without risk details the holds, and our article on the carrying methods reported by 2,644 owners shows what people actually do.
Frequently asked questions
Can a rabbit break its back without falling?
The dominant lumbar location is consistent with a twisting or kicking mechanism against restraint, but the study does not attribute cases to specific scenarios: it describes what breaks, not how each fracture happened.
Should a doe be spayed to avoid this type of fracture?
The study does not test spaying. It only notes that seven of the twelve tumour-related fractures were linked to uterine metastases, which fits the gynaecological monitoring already recommended in does. Find all our guides on the rabbit hub.
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This guide is part of Planète Pets’s Rabbits universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.
