What is the recommended vitamin D level for growth?

Based on the provided sources, no specific numerical value or exact level is provided for the recommended vitamin D intake for growing puppies.

However, the sources do provide several important guidelines regarding vitamin D and puppy growth:

• Its Role in Growth: Vitamin D is crucial because it controls calcium and phosphorus metabolism. Adequate intake helps maintain healthy bone formation and prevents osteomalacia (softening of the bones) during development and into adulthood.

• The Dangers of Excess: Just like calcium, receiving too much vitamin D is a risk factor for Developmental Orthopedic Disease (DOD). Specifically, excess vitamin D intake has been linked to radius curvus syndrome, though the exact cause is unknown.

• How to Ensure Proper Levels: Because getting the exact balance of calcium, phosphorus, and vitamin D is so critical and difficult to do manually, experts recommend feeding a commercial diet specifically formulated for large-breed puppies. These diets are already designed to provide defined, appropriate levels of vitamin D.

• Avoid Supplementation: To prevent giving your puppy a dangerous excess of vitamin D, you should never add multivitamin supplements or top dressings to a balanced commercial diet.