We use salt licks and have success w/ apple blocks as well. We ahve used bag salt melted into water and poured over stumps and they will lick that stump smoother than a peice of sand paper can. We have them digging into the ground making holes. Now one year we bought minerals and salt and mixed 50/50. The hated the minerals and if you taste them they are terrible bitter, but loved the salt. So we mixed 70 salt- 30 minerals and then they would work it over, again poured on stumps!

Deerr cocaine has some luck but you have ot refresh evry 30 days or so and if you have a lot of rainfall even more. If you hunt in some states you must have your blocks and feeders out of the woods 30 days prior to deer season, but if you use the loose salth mineral combo it will soak into the stump or ground for year round use.