AP-18 Hi-Mag: Supplement with added non-chelated magnesium to help combat grass tetany

  • Weather Resistant
  • Mineral Fortified
  • Consistent Availability

AP-Mag 18 contains added non-chelated magnesium to help combat grass tetany. Intended for use in herds that are grazing various types of forages at any time of the year, AP-Mag 18 (or “All Purpose-Mag” 18) is a one-size-fits all supplement for multiple species of livestock in the same pasture. AP-Mag 18 offers 18% protein, has no added copper, and includes high levels of vitamins A, D, and E.

AP-Mag 18 is ideal for young offspring, show animals, or pasture beef cattle, especially in cool seasons or wherever grass tetany is a concern.

Feeding Directions

Provide free choice as a supplement to pasture cattle, and horses at the rate of one block for each 15 to 25 head and to sheep or goats at a rate of one block for each 25 to 35 head. Place in pasture near areas frequented by livestock, such as watering locations, shade or loafing areas. Cattle typically consume 0.5 to 1.0 pound per head daily. Sheep normally consume approximately 3 to 4 ounces per head per day. Mature horses will typically consume 1 to 3 pounds per head daily. Consumption may vary depending on climate, grazing conditions, condition of livestock and/or availability of other feeds. In situations where climate and/or other factors result in consumption less than expected, intake of supplement can be increased by providing additional blocks per pasture.

Provide access to fresh water and free-choice salt at all times.

Guaranteed Analysis

Guaranteed Analysis

Added Magnesium

AP-Mag 18 offers the benefit of extra magnesium in a highly palatable supplement that livestock will readily consume. This supplement contains a minimum of 2% magnesium. Magnesium is needed for activation of enzymes, nerve transmission, skeletal tissue, bone formation and milk production.


A low feeding rate per head daily can significantly minimize your feeding costs on a cost per head per day basis.

High Mineral Fortification

This supplement is Vitamin and Mineral fortified eliminating the need to feed additional free-choice minerals.

Weather Resistant

An exceptionally dense block that maintains its integrity even in hot, humid weather or precipitation.

Returnable Steel Barrels

Economical and environmentally friendly and eliminate the expense of additional feeding equipment.

Minimal Labor

Easy to feed. Simply place the block in areas of easy access to livestock.

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