Egg shells

[louis]

I don't feed commercial dog food which would have enough calcium. I also don't feed prey raw, which would have enough calcium from the bones. I make my own dog food. The food makes enough for 2 + weeks and I put in 2 tablespoons over the entire batch of food, so IDK, maybe one sixteenth of a teaspoon per day, maybe less. Supplementing a dog's diet with too much calcium or phosphorus can increase its susceptibility to diseases. Calcium, phosphorus and vitamin D all work together to form a balance. If you do not have a reason to supplement (meaning your dog has been tested for calcium level and came back low) don't supplement.

Thanks Lisa for this useful information.