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Nutritional and skeletal · Updated 2026-09-21

Metabolic bone disease in reptiles

Weakened, deformed bones caused by calcium, vitamin D3 or UVB deficiency and incorrect calcium-to-phosphorus balance.

Urgent veterinary attentionReptilesBearded dragonsTurtles
Veterinary care setting for reptiles and bearded dragons and turtles
Visual guide to warning signs including breathing difficulty, appetite loss, vomiting, mobility change, abnormal droppings and collapse
Changes in breathing, appetite, movement, digestion or alertness can need veterinary assessment. Collapse and breathing difficulty are emergencies.

Signs to watch for

  • Swollen or rubbery jaw
  • Tremors or twitching
  • Difficulty lifting the body
  • Bent limbs or spine
  • Lethargy
  • Poor appetite

Causes and risk factors

Absent or expired UVB lighting, unsupplemented diets, incorrect temperatures preventing digestion, and phosphorus-heavy feeding.

How veterinarians diagnose it

Husbandry review, physical examination, blood calcium and phosphorus levels and radiographs showing reduced bone density or fractures.

Treatment and management

Immediate husbandry correction plus veterinary calcium therapy, fluids, pain relief and nutritional support; fractures need careful handling.

Prevention

Correct species-specific UVB replaced on schedule, measured basking gradients, dusted appropriate prey or greens and routine weight checks.

Outlook

Early cases often improve well; established deformities are permanent even once progression stops.