Good idea. While I haven't had a chance to run the egg shell idea by a vet, I would tend to lean towards lending it some validity, as my sister-in-law needs calcium supplemented in her diet for medical reasons. The store bought supplements were outrageous, so her doctor gave her a recipe (I don't have it, have only seen her make it) using egg shells and lemon juice. She was supposed to take a couple of spoonfuls of that a day instead of the calcium supplements. I do remember her saying that in order to get the pure source of the calcium (which is apparently what egg shells are), she had been instructed to use shells from raw eggs, not cooked eggs. Does this fit in with what anyone else has heard?

That being said, our lab is on laxative capsules due to a gland issue she has, and the vet said to get the kind without calcium. Now, she may have said that due to the fact that dog foods have it (?) and too much would not be good.

Now I've got myself wondering . . . I'll have to add it to my list of questions as we are going for a medical follow up and booster shots in a week or two . . .