What's all this about oyster shells, my friends? Are we simply tying to increase our expenses so tat eggs which we raise for a dollar and pop and sell for a quarter can now cost EVEN MORE?! My birds get their own eggshells, dried and ground, back as scratch for calcium. Works great. Never bought calcium when they are excreting it daily in the perfect, most usable form. Long s theyre dried and ground, the birdies dont make the connection with those round things they lay and cackle about, so we've had no trouble with cannibalism. Any other reason for calcium that I should know or do you guys just LIKE spending your hard earned yen at the feed store?