Salt blocks, also known as salt licks, are used by farmers for domesticated animals and by hunters to attract deer. Echonet.org states that salt blocks provide animals with the proper nutrients that they not only need but desire, and they can smell the sodium from far away. Make your own salt block with just a few basic ingredients.
Mix together two parts rock salt, four parts bonemeal and one part of clay. Pound and sift the clay from a termite mound.
Add enough water to the mixture to create a thick paste.
Line a cardboard box with a trash bag.
Pour the mixture from the bucket into the lined box. Allow several hours for salt block to harden.
Remove the salt block from the box when dry. Peal away the trash bag and dispose.