Bone Metabolic Disease in Bushbabies
Bone metabolic disease (BMD) in bushbabies is a nutritional disorder affecting the skeleton. It results from an imbalance of calcium, phosphorus, or vitamin D in the diet. Bones become fragile, deformed, and fracture more easily. This is a...
What is it?
Bone metabolic disease (BMD) in bushbabies is a nutritional disorder affecting the skeleton. It results from an imbalance of calcium, phosphorus, or vitamin D in the diet. Bones become fragile, deformed, and fracture more easily. This is a common condition in small nocturnal primates kept in captivity, particularly when their diet is not suited to their specific nutritional needs.
Key point
If untreated, this condition can lead to spontaneous fractures and permanent bone deformities.
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:
Early signs are subtle: the animal moves less, jumps hesitantly, and appears stiff upon waking.
As the disease progresses, lameness develops, reluctance to climb or jump (behaviours that are natural for bushbabies), limbs that appear deformed or bowed, and sometimes spontaneous fractures during routine jumps.
In advanced cases, the animal may show tremors, general weakness, loss of appetite, and in severe cases, inability to move or seizures related to a severe drop in blood calcium.
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 main cause is prolonged dietary imbalance: insufficient calcium intake, excess phosphorus (common with diets too rich in unsupplemented insects or fruit), or vitamin D3 deficiency.
Because bushbabies are nocturnal animals, they do not naturally benefit from vitamin D synthesis through sun exposure as other species do, making dietary vitamin D intake even more critical.
Lack of adequate UVB lighting in captivity worsens the imbalance.
Diet composed mainly of calcium-unsupplemented insects (unbalanced phosphorus-to-calcium ratio), absence of vitamin D supplementation, lack of adequate UVB lighting in captivity, young growing animals or pregnant or nursing females with increased nutritional demands, poor dietary diversity.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Your veterinarian will perform a thorough physical examination, looking for deformation of the long bones, pain on palpation, or abnormal gait.
X-rays allow visualization of bone demineralization, fractures, or deformities.
Blood work may be recommended to measure levels of calcium, phosphorus, and sometimes vitamin D, in order to confirm the metabolic imbalance and guide treatment.
Treatment
Management is based primarily on gradual correction of the diet under veterinary supervision, with appropriate calcium and vitamin D supplementation.
In cases with pain, pain medication may be prescribed.
If a fracture has occurred, immobilization or surgical treatment may be needed depending on severity.
Strict rest and environmental modifications (limiting jumping) are often recommended during recovery.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Provide a varied and balanced diet that includes insects properly supplemented with calcium before feeding them to your galago—this is done through gut-loading and dusting.
Ensure a calcium-to-phosphorus ratio suited to the species, under the guidance of a veterinarian experienced with exotic animals.
Set up appropriate UVB lighting if recommended, even though galagos are nocturnal, as some captive care protocols use it as a supplement.
Have a veterinarian experienced with primates monitor the growth of young animals and the body condition of adults on a regular basis.
Possible complications
Repeated pathological fractures, permanent bone deformities, lasting locomotor difficulties, seizures related to severe hypocalcemia, and in severe cases, death if the metabolic imbalance is not corrected in time.
When to see a veterinarian
Your galago limps or avoids jumping when it normally would.
You notice deformation of a limb or abnormal posture.
Your animal appears to be in pain, is stiff, or is less active than usual.
A fracture is suspected following a jump or fall that seems minor.
Your animal shows tremors, weakness, or seizures.
Prognosis
The prognosis is favorable if the disease is detected early and the diet is corrected promptly: young growing animals can recover satisfactory bone mineralization. However, bone deformities that have already developed are often irreversible, and the prognosis becomes guarded in cases of multiple fractures or delayed treatment.
Frequently asked questions
Can the galago completely recover from this disease?
If caught early, yes, especially in growing children. But bone deformities already present often remain visible even after the diet is corrected.
Is it sufficient to give powdered calcium to treat an affected galago?
No, calcium intake must be balanced with phosphorus and vitamin D, and adjusted by a specialist veterinarian, because an excess can also be harmful.
How to know if your galago's diet is appropriate? Here are the key indicators to monitor: **Physical signs of good health:** - Shiny, smooth fur without bald patches - Clear, bright eyes - Active and alert behavior - Healthy weight (not too thin or overweight) - Clean ears and nose **Digestive health:** - Regular, firm stools - No diarrhea or constipation - Good appetite **Behavioral indicators:** - Energy levels appropriate for the species - Normal sleep-wake cycles - Playful and curious behavior - Good muscle tone **What to watch for (signs of dietary problems):** - Lethargy or weakness - Dull or patchy fur - Diarrhea or digestive issues - Abnormal weight loss or gain - Lack of interest in food - Behavioral changes **Best practices:** - Provide a varied diet of insects, fruits, and vegetables appropriate for galagos - Consult a veterinarian specializing in exotic animals - Have regular check-ups - Research species-specific nutritional requirements - Observe your galago daily for changes If you notice any concerning signs, consult an exotic animal veterinarian promptly.
An experienced veterinarian specializing in exotic animals can assess the diet and recommend adjustments, particularly regarding the supplementation of insects given as food.
Is this disease common in captive galagos?
Yes, it is among the most commonly reported nutritional disorders in small nocturnal primates kept in captivity, due to the difficulty in reproducing their natural diet.
References
AAFP — American Association of Feline Practitioners
Content reviewed by the TunisieVet editorial team · Updated 25 August 2026
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