Active Developer 34 400B


Active Developer 34 400B is a supplement for dairy replacement heifers.

  • Life Stage:  Calf, Heifer
  • Feed Type:  Supplement
  • Feed Form:  Pellet
  • Packaging:  50-lb bag

Product Description

Active Developer 34 400B is a protein supplement formulated for replacement dairy heifers starting at 400 lb and fed through the first freshening.

Features & Benefits

Simplified nutrition

High protein content, from multiple, plant-based sources, offers an economical option for a calf grower or developer ration using on-farm ingredients.

Trace minerals and vitamins

Formulated to provide trace minerals and vitamins to help support optimal animal health and performance.

Selenium yeast

A source of selenium that is easily metabolized, supports reproductive health and performance.

Nutritional Information

Guaranteed Analysis
Crude Protein, min 34.00%
Crude Fat, min 1.00%
Crude Fiber, max 9.00%
Acid Detergent Fiber, max 11.50%
Calcium, min 3.00%
Calcium, max 4.00%
Phosphorus, min 1.00%
Salt, min 1.60%
Salt, max 2.10%
Selenium, min 4.6 ppm
Vitamin A, min 60,000 IU/lb
Vitamin D3, min 7,000 IU/lb
Vitamin E, min 350 IU/lb


Processed Grain By-Products, Soybean Meal, Sunflower Meal, Cane Molasses, Calcium Carbonate, Monocalcium Phosphate, Dicalcium Phosphate, Salt, Animal Fat, Vitamin A Acetate, Vitamin D3 Supplement, Vitamin E Supplement, Calcium Iodate, Manganese Sulfate, Zinc Sulfate, Ferrous Sulfate, Copper Sulfate, Cobalt Carbonate, Zinc Oxide, Selenium Yeast, Ethoxyquin and BHT (preservatives).

Active Drug Ingredient Amount
Lasalocid 400 g/ton

Feeding Directions

Hand Fed: Feed to replacement heifers at a rate of 1.0 lb per head per day to provide 200 mg of Bovatec per head per day. Feed the grain mix at the rate of 4 pounds per head per day to replacement dairy heifers. Four pounds of this mix provides 200 mg of lasalocid per day. Feed with free choice roughages

Mixing Directions

Grain mix: Active Developer 34 400B - 500 lbs; Rolled corn - 1,400 lbs; Molasses supplement - 100 lbs.


A withdrawal period has not been established for this product in pre-ruminating cattle. Do not use in calves to be processed for veal.


Feeding undiluted or mixing errors may result in an excess Lasalocid concentration which could be fatal to cattle and sheep. Do not allow horses or other equines access to feed containing Lasalocid as ingestion may be fatal. Safety of Lasalocid for use in unapproved species has not been established.

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