Metabolic bone disease from inadequate UV-B exposure is one of the most common welfare failures in captive reptiles, preventing it through correct lighting is fundamental to reptile husbandry.
Metabolic bone disease is one of the most preventable yet common welfare failures in captive reptiles. The condition develops slowly over months of inadequate UV-B exposure, often without obvious signs until bones are significantly weakened. By the time spinal deformity or pathological fractures occur, substantial welfare harm has already occurred. Preventing MBD requires appropriate UV-B lighting matched to species requirements, positioned correctly without glass filtration, and replaced regularly. The welfare cost of inadequate UV-B extends over the lifetime of the animal through chronic pain and structural deformity that impairs normal movement.