What is metabolic bone disease?

• A. Not enough vitamin D or calcium, causing weak thin bones.
• B. Bone inflammation.
• C. Joint disease.
• D. Excess vitamin D causing brittle bones.

Answer: (A)

Metabolic bone disease occurs when bone mineralization is impaired because there isn’t enough calcium or vitamin D. Calcium is needed for bones to harden, and vitamin D helps the body absorb calcium. Without enough of these, the bone matrix doesn’t mineralize properly, so bones stay weak and thin and can bend or break easily. This is common in growing cats and dogs when their diet is low in calcium or vitamin D, or when absorption is poor. So the best description is that metabolic bone disease happens from not enough vitamin D or calcium, leading to weak, poorly mineralized bones.

Other choices describe different problems. Bone inflammation is a separate condition (bone tissue inflammation), joint disease refers to issues like arthritis affecting joints, and excess vitamin D would cause other problems rather than the thin, poorly mineralized bones seen in metabolic bone disease.