Just a little input here. I found that minerals when applied to stumps and downed trees serve all the animals for years. First they eat on the mineral soaked rotten wood and as time passes the nutrients are washed into the ground. I always renew every winter for use when it gets warm but it is not necessary because they will keep digging the spot till all is gone. Deer density is the key to how far apart the licks should be. In the deep south states you should have a lick every 1/4 mile or so.