EnergiLass Rumen Booster

EnergiLass Rumen Booster is a supplement for stressed cattle in the feedlot or on pasture; for cows before and during the breeding season.

  • Life Stage:  Breeder, Cow/Calf, Dairy Beef
  • Feed Type:  Low-Moisture Block
  • Feed Form:  Block
  • Packaging:  33.3-lb tub, 50-lb tub, 250-lb tub

Product Description

EnergiLass Rumen Booster is formulated for preconditioning, stressed, shipped-in feeder cattle, or cattle in sick pens on tall types of rations. 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

Highly palatable

The molasses content of EnergiLass results in sweet block supplement, which encourages and maintains consumption, even in stressed cattle.

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, and overall cattle performance.

B vitamins

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

Yeast products

A source of high quality yeast helps to stimulate intake, aids in forage fermentation and supports a healthy rumen environment.

Added salt

Salt encourages supplement and water intake, both important in stressed calves; and helps maintain electrolyte balance.

Trace mineral fortification

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

Optimal vitamin fortification

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

Continuous protein delivery

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

Container options

This product is available in 33.33 lb, 50 lb, and 250 lb containers. Availability varies by plant.

Nutritional Information

Guaranteed Analysis
Crude Protein, min 14.00%
Crude Fat, min 5.00%
Crude Fiber, max 2.00%
Calcium, min 1.50%
Calcium, max 2.00%
Phosphorus, min 2.00%
Salt, min 4.50%
Salt, max 5.50%
Magnesium, min 0.20%
Potassium, min 2.00%
Cobalt, min 13 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 Mononitrate, 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.

Feeding Directions

Feed Kent EnergiLass Rumen Booster to stressed or shipped in feeder cattle, or cattle in sick pens on all types of rations. Begin feeding to breeding cattle 30 days prior to and throughout the breeding season. Place barrel(s) in a dry location near the animal's source of water or loafing area. Consumption will vary depending on animal size; health; quality, source, and availability of roughage and/or grains; number of animals per barrel and barrel location. Offer one 250 lb barrel to every 10 head when cattle are stressed and one for every 30 head when cattle are healthy. Cattle typically consumer between 0.25 and 0.75 lbs per head daily.
Daily intake values are approximate. To increase consumption, decrease the number of animals per barrel. To reduce consumption, increase the number of animals per barrel, or place barrels away from the normal loafing area.

Provide clean, fresh water at all times. DO NOT feed free-choice salt and/or minerals, provide these in the regular ration.


This product, which contains added copper, should not be fed to sheep or any species with a low tolerance to supplemental copper.


Use as directed. Consumption of selenium should not exceed 3 mg per head per day.

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