At Arm & Hammer Animal Nutrition we use science

to unlock the power of nature to create solutions that are designed to optimize animal productivity. Our expert team can help troubleshoot challenges and translate science into an action plan, always remaining focused on Animals First. Productivity Always.

Kick up the K.

DCAD Plus™ gives cows the potassium (K) they need without adverse ration heating or the negative effects of chloride. It mitigates heat stress and can serve as a boost for milk fat depression.

The DCAD Plus advantage:

  1. Mitigates milk fat depression
  2. Combats the effects of heat stress
  3. Helps keep cows hydrated, especially during hot weather

Replace the K lost through production.

Research indicates most early-lactation and high-producing cows are K deficient even when fed at NRC levels.1,2

TIP #1

Test forage DCAD.
Seasonality and climate can affect DCAD levels. Test forages often using wet chemistry analysis to ensure proper DCAD levels are being fed.

TIP #2

Got milk fat depression?

A common culprit is the variable amounts of fatty acids from feeds like DDGS, gluten and hominy. Cottonseed and other oilseeds, combined with increasing dietary starch and other fermentable feeds, can also contribute.

More K. More milk and more fat.

University research3 conducted on commercial Holsteins concluded that increasing K and DCAD in early-lactation diets resulted in high-producing cows improving milk and component production.

  • +0.41 lbs./day improvement in butterfat levels
  • Cows fed DCAD Plus outperformed the control group in percent and pounds of milk fat production
  • +8.58 lbs./day improvement in FCM
  • +4.62 lbs./day improvement in milk

Navigating milk fat depression: solve it — fast.

The rumen becomes acidic through highly fermentable carbohydrates, insufficient fiber or when a large quantity of unsaturated fatty acids are present. In this environment the rumen bacteria can produce milk fat intermediates that can cause milk fat depression. Feeding DCAD Plus can positively influence butterfat production even when feeding high-fat byproducts.4,5

Recommended feeding rates.


1.) Analyze forages and byproduct commodity feeds known to vary in DCAD minerals (whey, molasses, etc.) for Na, K, Cl, S and Mg by wet chemistry. Remember that water can contribute additional minerals as well, if your source is of questionable quality.

2.) Remove as many chloride and sulfate salts as possible from the diet. This step alone will increase DCAD.

3.) Add DCAD Plus to achieve a dietary K level of at least 1.7% of the total DM during nonheat stress periods, and to at least 2.0% just prior to and during heat stress periods of the year.

4.) Adjust DCAD to your target level by adding a sodium buffer (Sodium Bicarbonate or SQ-810™). Total dietary sodium can be raised to as much as 0.8% of the ration dry matter. This would add the rumen buffering required, as well as give you the ability to fine tune the DCAD.1

5.) Adjust dietary Mg such that the ratio between K and Mg is between 4:1 and 5:1.

NOTE: For more details on formulating ration DCAD, ask your Arm & Hammer Animal Nutrition representative about our How-To Sheets for balancing positive and negative DCAD diets.

Who Doesn't Want To

Boost Milk Fat & Combat Heat Stress?

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We use scientific research to unlock the power of nature to create products that focus on your Animals First. Productivity Always. To learn more about MEGALAC contact your nutritionist, veterinarian or Arm & Hammer Animal Nutrition representative or visit

1. Arm & Hammer Animal Nutrition. DCAD Nutrition for Dairy Cattle Research Summary. PC 2063-1003, 2010.
2. Jarrett JP, Taylor MS, Nennich TD, Knowlton KF, Harrison J, Block E. Effect of dietary calcium and stage of lactation on potassium balance in lactating Holstein cows through 20 weeks of lactation. The Professional Animal Scientist 2012;28:502 506.
3. White R, Harrison J, Kincaid R, Block E, St-Pierre N. Effectiveness of potassium bicarbonate to increase dietary cation-anion difference in early lactation cows. J Anim Sci Vol. 86, E-Suppl. 2/J Dairy Sci 2008;91:Abstr. 106.
4. Jenkins TC, Jr. Bridges WC, Harrison JH, Young KM. Addition of potassium carbonate to continuous cultures of mixed ruminal bacteria shifts volatile fatty acids and daily production of biohydrogenation intermediates. J Dairy Sci 2014;97:975-984.
5. Lamar KC, Weiss WP. Milk fat depression caused by feeding distillers grains and corn oil to dairy cows was partially alleviated by supplementing potassium carbonate. J Anim Sci 2013;91(Suppl.2)/J Dairy Sci 2013;96(Suppl.1) Abstr. 469. Presented at ASAS Joint Annual Meeting 2013.