Pictures of examples of free choice mineral feeders clients shared with us. This is an example of a heavy duty portable unit used for cows and calves. The free-choice method of mineral supplementation uses equipment such as this to make available nutrients identified as deficient by soil analysis or in acquired animal health condition symptoms, is becoming increasingly popular.  The uptake of this method of animal health management is predicated on livestock taking selected and often unpalatable raw minerals necessary for improved health, with the bonus that the excrement from these animals will aid in soil remineralisation over an extended time period.