Dog Tip #1 - Calcium. Did you know your dog should have calcium in his/her diet? So, how do you get this into their diet? Well, in the wild, dogs and wolves eat the bones of their prey...our domesticated variety don't have that option...so we need to help them. Good sources are yogurt, cottage cheese, cheese...but best is egg shells. I buy organic eggs...once you break the shell...wash it out, allow to dry, run through a coffee grinder until it is a powder...store in a glass dish (preferbly) in your frig, and sprinkle onto your dogs food. :-)