Well! I will agree with you but at the same time I will disagree with you. Yeah! Calcium is good but not really good if you are rearing them for a commercial purpose. Most of the feeds we have here already have this content in them, like Newhope feed, happy chicken feed and many of them. If broiler chicken consume too much calcium they will have the strength and agility to jump around and with that can lose weight. So you rearing Broiler chicken for commercial purpose will turn out to be shortage for you. Just thinking out loud. Take care.