Hi shelties mom –
Different bone meals contain different amounts of calcium and phosphorus so you can’t know how much to add unless you know how much calcium and phosphorus is in the bone meal. When using straight calcium (such as ground eggshell) you would add 800 – 1,000 mg. calcium per 1 lb. meat when adding bonemeal, because it contains calcium and phosphorus, you would have to add slightly more – enough to provide around 1,200 mg. calcium per 1 lb. meat. You don’t want to use eggshells and bonemeal – use one or the other.
