Low calcium levels can lead to metabolic bone disorder

MBD occurs when the bones are leached of their normal calcium levels, becoming brittle and fibrous. The low calcium levels also affect other body functions, such as normal muscle action and walking, immunity and general health. "MBD can be debilitating and painful, especially if severe. It can affect the legs and joints, making walking difficult."

Reptiles with MBD will commonly also have a weak mouth and jaw, and can break their jaw while they are eating. Lizards with MBD will commonly walk with a limp, or not walk at all, and tortoises often develop a weak, flexible shell.

Gething says: "As it becomes more severe, it often causes the reptile to hide away, not eat, lose weight and, if not treated, it is life-threatening."

MBD takes time to develop, and symptoms can be fairly mild and subtle at first, the vet says.

However, it is not often until the pet has a broken leg or severe bone deformities that the owner takes action. "The most frustrating thing is that MBD is easily preventable with correct care and housing."