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(as received from Vossen Labs Netherlands)





What is so special about using Green O.K.?

  • Optimal feed quality and feed taste with advantages of less wastage via secondary heat (minimum 10% of the protein and 30-40% of sugars, resulting in less energy)

  • Better results via effect of Propionic Acid (see trial results)

  • Reduces chances of negative influences of moulds and mycotoxins, which can cause abortion etc. (see further articles and test figures)

  • Reduced heat production in mixed feed that will result in less additional feeding administration, meaning less labour.


Keeping moulds out of food and animal feed with propionic acid (Feed Tech 10-07-06)

EU hygiene directive, in force since January 2006, requires special safety for animal feed. Feed have to be free of mould and have a long storage life. German research shows that PROPIONIC ACID (main ingredient in Green OK) is the ideal animal feed preservative.


  • Cost effective and environmentally compatible method for preserving grain and other forage:

    • Less costs for expensive silos and drying equipment.

    • Propionic acid destroys the harmful microbes, which are naturally present in animal feed

    • Animals digest the feed better- resulting in better growth 

    • Improved health


  • Propionic Acid is the most effective acid in the family of carbonic acids

    • Moulds cause:

      • fertility disorders

      • digestive disorders

      • immune defiency in animals

      • combats pest, like yeasts, bacteria and insects like the granary weevil.


  • Natural product and energy supplier

    • A single cow produces 1,5 litre propionic acid per day as a source of energy via bacteria from the cellulose in the grass. 1 kg Propionic Acid has the nutritional value of 2 kg barley

  • Safer cheese production

    • in the maturation process with the production of Swiss cheese, like Emmenthaler, bacteria breaks up lactic acid products into propionic acid and carbon dioxide. The acid prevents the cheese from going bad during the long maturation period. For this reason our BROEISTOP showed its quality in Switserland, especially with corn silage rations in the summer period!

  • As an additive in liquid animal feed, hay and drinking water

    • Micro organisms and algae are no longer able to grow and water does not get contaminated. Propionic acid is extremely effective in combating moulds and pests.

  • As an element of synthesis of Vitamin E

    • It is the first molecular element in the process for manufacturing Vitamin E, which is present in young green fodder and wheat germ.


Mycotoxins in feed (ingredients), found in Asia:

Most farmers and people from the animal husbandry know that animal feeds and feed ingredients frequently come from Asian countries.


An article in Feed Tech 11-03-2007, show the high levels of mycotoxines in animal feeds:




















Sections in misborn calves showed the following causes (Dutch Animal Health Institute):

Infections, based on spores of mycotoxins, bacteria and other infections, which can infect the mother cow via feed or other contact:


Average % from 2003-2006:


  • Neospora: 28%

    • for 75% present on farms in Holland show 1 or more infected cows. Around 10% of the Dutch dairy herd was infected, in Sweden only 0,5% and Spain 16%

    • the cause is contact with dogs (secretion of oöcysts (eggs of neospora))

    • high temperature and dogs around farm animals are crucial


  • Arcanobacterium pyogenes: 15%

    • caused by bacteria, mostly present on heels and udders. Produces much pus

    • infective when bacteria effect the uterus via the bloodstream


  • Salmonella (Dublin): 5,5%

    • mostly present in autumn at the end of the gestation period

    • goes along with problems with liver fluke

    • is zoönose (infective for humans)


  • Bacillus licheniformus: 6,5%

    • present in soil and bad conserved silage


  • Listeria: 2%

    • present in bad silage

    • an infected cow can infect the rest of the herd 

    • is zoönose (infective for humans)


  • Staphyloccocus and other bacteria: 3%


  • Moulds: 1,5%


  • Other: 30%


Most spores, bacteria and moulds are sensitive for a low pH, this could be prevented by a good silage conservation and by avoiding secondary heat before feeding.



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