NRB 40-25 300R


A supplement for mixing steer and heifer feedlot rations.

  • Life Stage:  Finisher
  • Feed Type:  Supplement
  • Feed Form:  Pellet
  • Packaging:  50-lb bag

Product Description

NRB 40-25 300R is a “no roughage” supplement designed to be mixed with corn and fed as the sole ration to finishing beef cattle and dairy beef steers.

Features & Benefits

Simplified nutrition

This high fiber pellet only requires corn (cracked or whole shell) to complete the ration. No additional roughage is needed. The mixed ration can be fed in a self-feeder or hand fed daily.

Trace minerals and vitamins

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


Improved feed efficiency and prevention and control coccidiosis cuased by Eimeria bovis and Eimeria zuernii.

Nutritional Information

Guaranteed Analysis
Crude Protein, min 40.00%
NPN, max 25.00%
Crude Fat, min 0.50%
Crude Fiber, max 16.00%
Calcium, min 4.00%
Calcium, max 5.00%
Phosphorus, min 0.50%
Salt, min 0.25%
Salt, max 0.75%
Potassium, min 2.00%
Cobalt, min 1.8 ppm
Zinc min 600 ppm
Vitamin A, min 19,000 IU/lb
Vitamin D3, min 1,900 IU/lb
Vitamin E, min 19 IU/lb


Plant Protein Products, Processed Grain By-Products, Urea, Animal Protein Products, Roughage Products, Calcium Carbonate, Salt, Potassium Carbonate, Potassium Sulfate, Magnesium Sulfate, Vitamin A Acetate, Vitamin D3 Supplement, Vitamin E Supplement, Animal Fat, Calcium Iodate, Ferrous Sulfate, Copper Sulfate, Cobalt Carbonate, Manganese Sulfate, Zinc Sulfate, Potassium Chloride, Sodium Selenite, Ethoxyquin and BHT (preservatives).

Active Drug Ingredient Amount
Monensin 300 g/ton

Feeding Directions

For Improved Feed Efficiency: Feed the complete ration at a rate to provide 200-480 milligrams of monensin per head/day.

For Prevention and Control of Coccidiosis: Feed the complete ration at a rate to provide 0.14-0.42 milligrams of monensin per lb. of bodyweight depending upon the severity of the challenge, up to a maximum of 480 milligrams/hd/day.

Mixing Directions

Thoroughly mix NRB 40-25 300R Medicated into the appropriate amount of non-medicated feed to produce a complete medicated feed containing 20 to 40 g/ton monensin.

Monensin Level Desired in Complete Medicated Feed
lb/ton (mg/lb)
Amount of NRB 40-25 300R Medicated to make a ton of Complete Feed
Amount of Non-medicated Feed
20 (10) 133 1867
30* (15) 200 1800
40* (20) 267 1733
*No additional improvement in feed efficiency has been shown from feeding monensin at levels greater than 30 g/ton (360 mg monensin per head per day).


A withdrawal period has not been established for this product in 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 amount of refusals fed should be taken into consideration to prevent monensin overdosing.

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