Metabolic bone disease caused by inadequate UVB lighting and calcium metabolism is one of the most common and preventable welfare problems in captive reptiles, particularly bearded dragons and tortoises.
Metabolic bone disease is a welfare tragedy because it is almost entirely preventable with correct husbandry knowledge. The condition develops slowly, often without obvious early signs, meaning that by the time owners notice problems the animal has typically been suffering for weeks or months. The key welfare intervention is education before purchase — ensuring that prospective reptile owners understand UVB requirements and commit to providing appropriate lighting before acquiring the animal. Pet retailers have a responsibility to provide accurate information about lighting needs, but this is inconsistently done in practice. Veterinarians and reptile welfare organisations play an important role in outreach to existing owners about upgrading suboptimal setups.