Nutritional Secondary Hyperparathyroidism in Dogs: Welfare

Key Facts

• Caused by feeding all-meat diets with excessive phosphorus and inadequate calcium, triggering PTH release
• Most common in young dogs fed exclusively meat without bones or supplements
• Bones become pliable and prone to pathological fracture, particularly of the vertebrae and long bones
• Correction with balanced diet and calcium supplementation produces remarkable bone recovery
• Owners feeding raw meat diets must ensure calcium:phosphorus ratios are balanced (1.2-1.4:1 Ca:P)

Welfare Considerations

This condition causes preventable suffering through painful bone deformities and fractures in young, growing dogs. Vertebral fractures can cause spinal cord compression and paralysis. The welfare injustice is that the condition results from a well-intentioned but nutritionally incomplete feeding approach. Recovery on a balanced diet is dramatic — bones re-mineralize over weeks. Education of owners feeding raw or home-prepared diets about the critical importance of correct mineral balance is the primary prevention strategy.

What You Can Do

• Never feed an all-meat diet without balancing calcium sources — add raw meaty bones or calcium supplements
• Consult a board-certified veterinary nutritionist before starting any home-prepared diet
• Seek veterinary attention immediately for any young dog showing bone pain or reluctance to move
• Feed a complete, balanced commercial diet as the safest way to prevent nutritional deficiencies
• Correct diagnosis requires X-rays — do not assume fractures are from trauma without ruling out metabolic causes