EnergiLass Rumen Booster AFC


A supplement for stressed cattle in the feedlot or on pasture; for cows before and during the breeding season.

  • Life Stage:  Cow/Calf
  • Feed Type:  Low-Moisture Block
  • Feed Form:  Block
  • Packaging:  250-lb tub

Product Description

EnergiLass Rumen Booster is an all-natural protein, mineral and vitamin supplement formulated specifically for stressed cattle. Offer Rumen Booster to new shipped-in calves, when preconditioning or in the sick pen. Rumen Booster can also be offered to cows and heifers during the breeding season, to dairy calves at weaning and stressed dairy cows.

Features & Benefits

Continuous Protein Delivery

Research has shown that multiple, small doses of protein help improve forage digestion. EnergiLass provides supplemental protein 24/7, helping cattle get most out of each bite. This product is ideal for to complement a high forage TMR or for cattle on medium to high quality forages.

Highly Palatable

The high molasses content of EnergiLass results in a highly palatable supplement, encouraging and maintaining whole herd consumption.

Trace mineral fortification

Formulated to supply key trace minerals to help support optimal animal health and performance.

Trace mineral amino acid complexes

More readily available form of copper, zinc, manganese, and cobalt, compared it inorganic sources, which support a healthy immune system, overall cattle performance and reproductive performance.

Added salt

Unlike other EnergiLass formulas, Rumen Booster does contain salt. This also helps encourage intake, as well as supplying electrolytes and encouraging water intake in stressed animals.

Optimal vitamin fortification

Vitamins A, D and E support growth, metabolism, reproductive performance and proper immune system function.

B Vitamins

The addition of B vitamins, including thiamine, helps to stimulate appetite in stressed cattle.

Consistent Intake

The unique manufacturing process results in a product that cattle must lick in order to consume. This results in consistent, predictable intake that helps to manage costs per head per day.

AFC™ for horn fly control

AFC™ (Altosid®) prevents the emergence of adult horn flies from the manure of treated cattle. This product should be fed throughout the fly season to help keep cattle comfortable.

Nutritional Information

Guaranteed Analysis
Crude Protein, min 14.00%
Crude Fat, min 5.00%
Crude Fiber, max 2.00%
Calcium, min 1.80%
Calcium, max 2.30%
Phosphorus, min 2.00%
Salt, min 4.50%
Salt, max 5.50%
Magnesium, min 0.20%
Potassium, min 2.00%
Cobalt, min 4.5 ppm
Copper, min 510 ppm
Iodine, min 25 ppm
Manganese, min 1,400 ppm
Selenium, min 8 ppm
Zinc min 1,700 ppm
Vitamin A, min 200,000 IU/lb
Vitamin D3, min 20,000 IU/lb
Vitamin E, min 800 IU/lb
Thiamine, min 95 mg/lb


Molasses Products, Plant Protein Products, Monocalcium Phosphate, Dicalcium Phosphate, Processed Grain By-Products, Vegetable Oil, Salt, Calcium Carbonate, Roughage Products, Zinc Sulfate, Manganese Sulfate, Vitamin E Supplement, Magnesium Oxide, Zinc Amino Acid Complex, Manganese Amino Acid Complex, Copper Sulfate, Copper Amino Acid Complex, Cobalt Glucoheptonate, Sodium Selenite, Vitamin A Supplement, Selenium Yeast, Ethylenediamine Dihydroiodide, Thiamine Supplement, Choline Chloride, Vitamin D-3 Supplement, Cobalt Carbonate, Mineral Oil, Copper Chloride, Calcium Iodate, Niacin Supplement, D-Calcium Pantothenate, Riboflavin Supplement, Menadione Sodium Bisulfite Complex, and Vitamin B-12 Supplement.

Active Drug Ingredient Amount
S-Methoprene 0.005%

Feeding Directions

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

FEEDING AND MANAGEMENT INSTRUCTIONS: When used as directed, ENERGILASS Rumen Booster AFC block will provide sufficient (S)-methoprene insect growth regulator to prevent the emergence of adult horn flies from manure of treated cattle. Existing adult horn flies will not be affected. Start feeding before horn flies appear and continue use until cold weather marks the end of the horn fly season. Allow free choice to cattle. Cattle should consume an average of 0.8 ounces of ENERGILASS Rumen Booster AFC block per 100 lbs. of animal body weight per day, which is equivalent to 8 ounces per day for a 1,000 pound animal.

  1. Assure cattle are not starved for nutrients prior to feeding ENERGILASS Rumen Booster AFC block.
  2. Offer cattle 250 pounds of ENERGILASS Rumen Booster AFC block for every 15-25 head of cattle.
  3. Remove all other self limiting nutritional supplements.
  4. Locate ENERGILASS Rumen Booster AFC block where cattle congregate (watering, loafing, shade areas).
  5. Replenish ENERGILASS Rumen Booster AFC block on a regular basis as needed.
  6. If intake of ENERGILASS Rumen Booster AFC block is below 0.8 ounces per 100 pounds animal body weight per day, increase the number of feeding locations and/or change location(s) to areas more frequented by cattle.
  7. If intake of ENERGILASS Rumen Booster AFC block is above 0.8 ounces per 100 pounds animal body weight per day, reduce the number of feeding locations and/or change location(s) to areas less frequented by cattle.
  8. Introduction of this product after adult horn fly infestation is established will require treatment of cattle


See product label for precautionary and warning statements.

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