I'm not a hunter, but I know what a "salt-lick" is. And, if you know where one is, you can stake it out just like a watering hole, as the prey will come to get what they need.
Honestly, you can get salt cubes at a ranch store, for cattle. Ever see deer and other critters licking those things?
I just saw a report a week or so ago, about some kind of Ibex over in northern Italy. They were scaling the face of a dam. Folks couldn't figure out why. There were no plants growing there. Finally, after some folks used a really powerful telephoto lens, they realized the critters were licking the mortar that holds the blocks of granite together. When the mortar cured during construction, various salts were formed, and the Ibex were licking those salts.
Perception Search 13