Metabolic Bone Disease in Jerboas

What is it?

Metabolic bone disease, also called nutritional osteodystrophy, is a common condition in small wild or exotic mammals kept in captivity, including jerboas (Jaculus sp.). It results from an imbalance of calcium, phosphorus, and vitamin D in the diet. The bones become fragile, become deformed, or break more easily. This disease is often silent at first, then progressively worsens if nothing is corrected.

Commonly observed signs

These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.

Causes and risk factors

The main cause is prolonged dietary imbalance: insufficient calcium intake, excess phosphorus, or lack of vitamin D3 (which allows the body to use calcium). In jerboas, this most often occurs with a diet too high in seeds and low in green vegetables, hay, or appropriate supplements.

Lack of exposure to suitable light (UVB) can also play an indirect role, since some small mammals synthesize part of their vitamin D through light, although this mechanism is less documented in desert rodents than in reptiles.

Jerboas fed only sunflower seeds or unbalanced commercial mixes are at highest risk. Young growing animals, pregnant or nursing females (whose calcium needs increase), and elderly animals are particularly vulnerable. A habitat without access to varied food for several months promotes the development of the disease.

Diagnosis and care

Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.

Treatment

Treatment focuses first on correcting the diet under veterinary supervision, with calcium supplementation and sometimes vitamin D adapted to the species. Pain relief may be prescribed to comfort the animal. If a fracture is present, immobilization or surgical care may be considered depending on severity and the animal's size. Strict rest in a secure enclosure, without opportunities to jump, is often recommended during recovery.

Prevention

Possible complications

Without correction, the disease progresses to spontaneous fractures, permanent deformities of the spine or limbs, and gradual loss of mobility that can lead to partial paralysis. Chronic pain may also cause a significant drop in appetite and severely weakened general health.

When to see a veterinarian

Prognosis

The prognosis is favorable if the disease is caught early and the diet is corrected quickly: young growing animals can achieve proper bone formation. Deformities already present in an adult animal are often irreversible, though disease progression can be halted. Multiple fractures or advanced disease worsens the prognosis.

Frequently asked questions

References

Cornell Feline Health Center

Content reviewed by the TunisieVet editorial team · Updated 04 September 2026