I use my own, named it deeRoids (pronounced deer roids) its a lot cheaper than coCaine and according to their label a lot better for the deer. The back of their package says 40 to 45 percent salt! Mine is less than30 percent.Then the next biggest isCalcium andPhosphorous. it also has some other minerals in it. Check out the pics on my site, www.deeroids.com.[/align]