SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/reptile-metabolic-bone-disease

Which signs point to metabolic bone disease in a reptile?

MBD shows up as soft or deformed shell and weak bones.

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  1. Bright eyes and a hard shell
  2. Soft or deformed shell and weak bones ✔
  3. Rapid weight gain

Why: Merck says too little calcium or vitamin D3, often from poor UVB light, causes weak, deformed bones. Turtles can get soft or deformed shells, broken bones and muscle twitching.

Huh, didn't know that: Merck says this is the most common bone disease in pet reptiles, mostly in fast-growing plant and insect eaters.

The dad joke
Why did the turtle love its UV lamp? It made it feel bone-afide great.
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References

Answer: Soft or deformed shell and weak bones. Merck says too little calcium or vitamin D3, often from poor UVB light, causes weak, deformed bones. Turtles can get soft or deformed shells, broken bones and muscle twitching.

  1. Merck Veterinary Manual (pet owner): Providing a Home for a Reptile www.merckvetmanual.com/all-other-pets/reptiles/providing-a-home-for-a-reptile
    Broken bones, bone deformities, and soft or deformed shells in turtles may occur.
    Checked 2026-10-11.
  2. Merck Veterinary Manual (pet owner): Disorders and Diseases of Reptiles www.merckvetmanual.com/all-other-pets/reptiles/disorders-and-diseases-of-reptiles
    Secondary nutritional hyperparathyroidism is the most common bone disease seen in pet reptiles.
    Checked 2026-10-11.

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