I have been trying and using all sorts of different brand minerals, and what I found is what works great in one area, deer in other area's might NOT go near it
Like trophy rocks, deer here at my place won't go near them< NO idea why, but seen them hammer them in other area's
I had my best luck in Ohio with Black Magic deer cocaine mineral in the powder form
I could dump a bag or two out and come back a yr later and have a 6 ftx 6 ft hole 2+ ft deep, and didn;t add anything in a yr and they would still be hitting it>
impressed me\
YET on my property, deer won't go near a mineral lick of any brand, they just won't go near them, and I have a LOT of deer here, they just wash away
20 miles away, they again hammer the same stuff??
SO< to me, its a trial and error game of what works in your area, and NOT all places do deer crave them< guess if they get enough food /minerals in there diet they don';t bother with it??
or that's my guess?