Adequate UV-B lighting is essential for metabolic bone health in many reptile species, and deficiency causes chronic suffering that is entirely preventable with appropriate husbandry.
Metabolic bone disease causes gradual demineralization of bones, leading to pathological fractures, spinal deformity, and chronic pain. It develops slowly and is often diagnosed only after severe and irreversible damage has occurred. The preventability of this condition - through correct UV-B provision and monitoring - makes every case a welfare failure. Reptile owners who invest in quality UV-B systems and regular bulb testing prevent enormous suffering.