The author is an extension dairy specialist at the University of Illinois, Champaign-Urbana.

Here's a look at feed additives and how they might fit your ration and your budget.

Feed additives are ingredients added for a non-nutrient role. (For example, sodium bicarb is added as a rumen buffering agent, not a source of sodium.) Additives vary in cost from 3 to 30 cents a cow a day. The main reason to add a feed additive is to enhance cow performance based on farm conditions, research results, the additive's role, and economic returns.

Here, I outline additives in six categories that may help you and your advisors decide if an additive should be included.

The category, current status, is classified in the following ways.
Recommended: Include as needed.
Experimental: Additional research is needed before recommending.
Evaluative: Monitor individual farm situation (there will be variable responses).
Not recommended: Currently lacks economic response.

Here are the additives mentioned in the September 25, 2010 issue of Hoard's Dairyman.
For complete function, levels of feeding, cost, benefit-to-cost ratio, feeding strategy and status, see this special focus on feeding article.
  • Anionic salts and products
  • Aspergillus oryzae
  • Biotin
  • Beta-carotene
  • Calcium propionate
  • Choline (rumen protected)
  • Enzymes (fibrolytic)
  • Enzymes (starch-amylase)
  • Essential oil compounds (cinnamon oil, clove oil, and/or garlic oil)
  • Immune stimulation (OmniGen AF-brand name)
  • Magnesium oxide
  • Methionine hydroxy analog
  • Monensin (Rumensin - brand name)
  • Niacin (B3, nicotinic acid, and nicotinamide)
  • Prebiotics (Nonviable probiotics)
  • Probiotics (Bacterial direct-fed microbes)
  • Propylene glycol
  • Silage bacterial inoculants
  • Sodium bentonite
  • Sodium bicarbonate/sodium sesquicarbonate (buffer)
  • Yeast culture and yeast
  • Yucca extract
  • Zinc methionine
The two-page full article appears on pages 620-621 of the September 25, 2010 issue.