I know a lot of people, and we use to, use salt blocks for attracting deer. But we switched to dumping out a bag of rock salt of the ground and either pouring a gallon of water or letting the rain soak it into the soil. After the salt gets dissolved, the deer go crazy. They eventually eat the soil thats saturated with salt and "dig" a hole. The spot where we put ours, this will be the third year and they have it dug out about a foot deep and 6 feet across. Has anyone else tried this and if so had any luck?