The best lick i have used is a one I mixed myself. the recipe is pretty much all over the internet. two 50 lbs bags of Salt, a 50 lbs of Trace mineral, and a 50 lbs bag of dicalcium phosphate. I also put a bag of black magic in the mix just to make it smell a little louder so they can find it quicker... these are pretty cheap cause you can make multiple licks, based on how much you want to put out at each site. you can get all these ingredients (save maybe the black magic) at any feed store. Run you around fifty bucks total and i made 4 sites with this much. For a lil over 12 dollars a site thats aint bad. I usually refill my sites about 1 every 8 months or so.