Dietary cation-anion difference (DCAD) measures the difference between positively charged cations, sodium and potassium, and negatively charged anions, chloride and sulfur, in a cow’s diet. DCAD affects internal functions, specifically blood buffering and calcium transfer.

A positive DCAD throughout lactation maintains blood-buffering capacity while supplying the right source of potassium for increased DMI and milk and component production, especially during heat-stress conditions.

A negative DCAD during close-up sets the stage for a successful lactation by facilitating the transfer of calcium from bones to the bloodstream, increasing blood calcium. This helps reduce incidence of postpartum metabolic disorders, avoids off-feed issues and prepares the rumen for the upcoming lactation.