I've been using these things for years. I first noticed that wherever I had a mineral block out for my cattle, the deer would pawl the ground later. I started putting them out for the deer and found that If left in the same place year after year, they will dig a rather large hole. I have since switched to loose minerals, mixing salt, and dicalciumphosphate mixed. I use this during calving season to help my brood cows with milk production. It does the same for deer and also gives the bucks plenty of calcium for antler growth, so I use it at my deer licks too. If you go this route, get the mixing salt with selenium as it gets the deer hitting it faster. I use a 2-1-1 mix, (2 mineral, 1 salt, 1 dicalcium phosphate).
Edited by msmith, 18 June 2012 - 08:46 PM.