The mineral lick that I used is 2 parts trace mineral salt, 1 part stock salt, & 1 part dicalcium chloride. All found at the local MFA. This is the mixture recommended by the Missouri Department of conservasion. I have benn using it for about 2 years now and the deer love it. It gives them all the minerals they need for milk, racks , ETC. This mixter will give you 200 hundred punds of of mineral for about $30.00. Dig a 3 foot hole about 10 to 12 inches deep and mix the mineral with the dirt. I also go and turn the mineral about every 3 months to keep the lick fresh. This is deffinatly a lot cheaper than the commercial stuff and in my opion offers a lot more than just plane old salt.