ORIGINAL: GMMAT
I replenish mine about every 3-4 months sometimes more in the Spring. I use Trace minerals, rock salt and Dicalcium Phosphate.
What exactly are trace minerals? Are they available at a feed store? I'm thinking of starting my own mineral sites this year and want to get the most out of them.
BTW, I am in the SR area of PA where baiting is legal, so minerals are as well.