[CorkyMax]

Very good link about calcium and the importance as to how much, etc.
Calcium – Balancing Your Dog’s Diet | B-Naturals.Com Newsletter

[Todd]

Thank you very much for sharing this! I don't have to worry too much because the majority of my dog's diet consists of raw meaty bones. The bone balances out the calcium requirements. If I occasionally feed ground meat, I generally take the ground egg shell approach.