STOCKMASTER® 12-12-12 Breeder Mineral


STOCKMASTER® 12-12-12 Breeder Mineral is a brood cow mineral formulated for the period from 60 days before calving until the cows are again pregnant. Specifically STOCKMASTER 12-12-12 Breeder Mineral is the product of choice in situations where organic trace mineral supplementation is desirable. This includes herds with historically poor reproductive performance, herds that desire maximum reproductive performance, herds that have previously been on a low plane of nutrition, and herds in which trace mineral antagonists such as molybdenum, sulfates and iron are present at high levels.


About the Product

Trace Mineral Supplementation

The trace mineral supplementation of STOCKMASTER 12-12-12 Breeder Mineral is designed for the critical period from 60 days before calving until the cows are again pregnant.

Organic Trace Minerals

Organic forms of cobalt, copper, manganese, zinc, and selenium are included to increase the bioavailability of these important trace elements.

Vitamin E

Vitamin E is included at the rate of 250 IU per head per day at a 4.0 ounce feeding rate to support the immune system during this stressful period.


STOCKMASTER 12-12-12 Breeder Mineral contains 12% phosphorus to supplement phosphorus intake during lactation and when low phosphorus forages are being fed.

Choice of Additives

Proper use of additivesnbsp;can improve animal performance; refer to product tag for specific claim. STOCKMASTER 12-12-12 Breeder Mineral is available with feed additives at FDA-approved levels.

Nutrient Analysis

Calcium (Ca), min % 11.4
Calcium (Ca), max % 13.6
Phosphorus (P), min % 12.0
Salt (NaCl), min % 11.9
Salt (NaCl), max % 14.2
Magnesium (Mg), min % 0.7
Potassium (K), min % 0.1
Copper (Cu), min 2,000 ppm
Selenium (Se), min 25 ppm
Zinc (Zn), min 8,000 ppm
Vitamin A, min 300,000 IU/lb.
Vitamin D3, min 30,000 IU/lb.
Vitamin E, min 1,000 IU/lb.
Feeding Directions

STOCKMASTER 12-12-12 Breeder Mineral is formulated to be fed at approximately 4.0 ounces per head per day. If STOCKMASTER 12-12-12 Breeder Mineral is offered free-choice, introduce it gradually over a 14 day period. Offer 3.0 to 4.0 ounces per head per day during this period to avoid over consumption.

Early lactation cows may desire more salt than that provided by STOCKMASTER 12-12-12 Breeder Mineral. Offer free-choice loose salt along with the mineral to cows in early lactation.

STOCKMASTER 12-12-12 Breeder Mineral intakes will vary. Estimate mineral consumption rates on a monthly basis. If intakes are greater than 4.0 ounces per head per day, offer more salt either free-choice or mixed with the mineral. If intakes are less than 4.0 ounces per head per day, decrease the amount of salt offered.

Provide fresh, clean water at all times.

Note: Individual mineral, trace mineral and vitamin requirements of cattle depend on stage of production gestation or lactation), size and age of animal. Likewise, the mineral, trace mineral and vitamin content of forages depends on geographical location and stage of forage growth. Please consult your sales representative if you have questions about mineral supplementation.  


This product, which contains added copper, should not be fed to sheep or related species that have a low tolerance level to copper.

Product Number

#70A1—STOCKMASTER® 12-12-12 Breeder Mineral, 50 lb.

Please Note: This product information sheet is meant to serve as a general overview and is not intended to replace the product label. Always refer directly to the product label for the most up-to-date nutrient content and feeding directions.