Have tried mineral blocks in the past on property I had permission to hunt and it sat there and slowly melted away in the rain and snow. A fr10iend of mine uses a powder that you mix into the soil in a small concentrated area along a trail and the deer here in Iowa go wild over it. What started out as a 2 foot circumference circle now looks like a 10 foot hog woller. Plan to use the same stuff here next year (once I find out what he uses). Gotta keep them deer happy!