Active Developer 34 400R


Active Developer 34 400R 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 400R 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, Plant Protein Product, Cane Molasses, Calcium Carbonate, Monocalcium Phosphate, Dicalcium Phosphate, Salt, 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
Monensin 400 g/ton

Feeding Directions

Feed the grain mix to replacement heifers at a rate of 2.0 pounds per head per day to provide 100 mg Monensin during the first 5 days of feeding, After the first 5 days of feeding, feed at a rate of 4.0 pounds per head per day to provide 200 mg Monensin. The complete feed must be used within 30 days of manufacture.

The complete feed must be used within 30 days of manufacture.

Mixing Directions

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


A withdrawal time has not been established for pre-ruminating calves. Do not use in calves to be processed for veal.


Do not allow horses or other equines access to feed containing Monensin. Ingestion of Monensin by horses has been fatal. Monensin-medicated cattle and goat feeds are safe for use in cattle and goats only. Consumption by unapproved species may result in toxic reactions. Feeding undiluted or mixing errors resulting in high concentrations of monensin has been fatal to cattle and could be fatal to goats. Must be thoroughly mixed in feeds before use. Do not feed undiluted. Do not exceed the levels of Monensin recommended in the feeding directions, as reduced average daily gains may result. If feed refusals containing Monensin are fed to other groups of cattle, the concentration of Monensin in the refusals and the amount of refusals fed should be taken into consideration to prevent Monensin overdosing.

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