Stay focused on the race. We’ll help you avoid pit stops.

During each animal’s life cycle there can be many unexpected stops and starts along the way. Think of Arm & Hammer Animal Nutrition as your pit crew, here to deliver the right advice and the right fuel at the right time. Together we’ll get the job done—and the race won—by focusing on your Animals First. Productivity Always.

Get race-ready, fuel up before transition.

Plan ahead for a smoother journey with BIO-CHLOR.™ Maintain negative DCAD levels prepartum. Spend less time dealing with metabolic disorders, and more time preparing for successful start-up milk.

The BIO-CHLOR advantage: less disease, better production.

BIO-CHLOR is a consistently formulated, palatable anion source that drives bacterial growth to support rumen function and produce metabolizable protein (MP). BIO-CHLOR delivers the negative DCAD required to consistently acidify cows and help prevent metabolic disorders.

Getting it done with BIO-CHLOR

  • Supports dry matter intake(DMI) prepartum leading to less time diagnosing off-feed issues postpartum
  • Smoother calvings with fewer metabolic disorders
  • Higher blood calcium levels through calving
  • Fewer resources needed to diagnose and treat sub-clinical/clinical issues
  • Delivers MP requirements to supportoverall efficiency
  • Delivers a more bioavailable magnesiumsource, replacing/reducing need for additional ration magnesium
  • Higher start-up milk
  • Promotes overall fresh cow health

A smoother road, before and after calving.

It’s about navigating safely through the crucial and critical zones—before, during and after transition.

The close-up ration helps set the stage for optimal performance in the upcoming lactation. One proven nutritional tool during transition is dietary cation-anion difference (DCAD) balancing.

BIO-CHLOR helps stop milk fever before it starts.

Monitor urine pH to prevent metabolic disorders.

  • Measuring urine pH is a tool to verify that cows are consistently consuming the negative DCAD diet that was formulated and delivered to the bunk.
  • The lower the ration DCAD the lower the urine pH.

Road Tip #1

Cows having trouble taking off after calving?

Poor fresh cow performance can be the result of subclinical milk fever, which can  be classified as the early stages of milk fever with minimal clinical or observable symptoms. Prevention is the best medicine. Make sure your close-up cows are fed  BIO-CHLOR to get off to a healthy start.

Milk production wins. Disorders lose.

A healthier herd with BIO-CHLOR.

Cows fed BIO-CHLOR™ at least 21 days prepartum experienced:1

  • 84.6% fewer cases of milk fever
  • 65.9% reduction in retained placentas
  • 71.0% fewer uterine infections

And a higher milk yield.

Cows fed BIO-CHLOR 21 days prepartum showed increased DMI and improved milk production compared to the control diet.2

Road Tip #2

A poor transition can result in the loss of 2,000 to 4,000 pounds of milk over the lactation.3

Start-up milk yield was significantly higher when cows were fed BIO-CHLOR for at least 21 days prepartum versus cows fed anionic salts or the control ration without an anion source.4

Road Tip #3

21 to 42 days. If pen moves or grouping strategy don’t easily allow for feeding a separate close-up ration, BIO-CHLOR is still your prepartum solution for improved health. Research5 supports that feeding BIO-CHLOR beginning as early as 42 days prepartum yields similar health and production benefits compared to feeding BIO-CHLOR 21 days prepartum without negative effects.

MP: the healthy road to efficiency.

Feeding BIO-CHLOR positively impacts protein production and rumen health.

BIO-CHLOR delivers more MP with an ideal amino acid profile. MP is the form of protein that is digested postruminally and supplies essential amino acids to the cow.

  • New ration formulation programs don’t formulate based on crude protein (CP) needs because MP is what drives productivity.
  • Cows have no nutrient requirement for CP.

Formulate rations for MP to more efficiently  deliver amino acids, which are vital to dairy  cow maintenance and productivity.

Road Tip #4

Unlike anionic salts or premixes, BIO-CHLOR helps keep cows eating during the toughest time in the life cycle. It’s a palatable anion and protein source–delivering negative DCAD and MP—for increased DMI and improved rumen function and efficiency.

Road Tip #5

When comparing BIO-CHLOR to soybean meal and a competitive manufactured anionic product, BIO-CHLOR is the best choice for greater bacterial growth and nutrient use:6

  • Lowers ration protein needs, increases crude protein digestibility
  • Increases digestion of total carbohydrates

The results are in: it’s a healthy win.

When metabolic disorders climbed in the fresh cow group, a Kansas dairy producer with three operating dairy sites began feeding BIO-CHLOR™ in the close-up pen. Cows fed BIO-CHLOR experienced the following improvements:7

  • Retained placentas declined on all three dairies, falling as much as 90.9%.
  • Week 4 milk production increased over all lactations on both Dairies 2 and 3. Dairy 1 produced the same amount of milk prior to and during BIO-CHLOR supplementation.

Boost health and productivity: it’s a win-win.

The transition period can positively influence milk production, health, breeding pen success and, ultimately, profitability. BIO-CHLOR can increase Income Over Feed Cost (IOFC), even at different milk price points.

Navigate the life cycle journey with BIO-CHLOR.

Fuel up: recommended feeding rates.

Feeding rates will vary and are approximately 1.5 to 2.0 lbs. per cow per day.

  • Obtain DCAD forage analysis by wet chemistry and test water supply to determine chloride, potassium, sodium and sulfur levels which can vary by water source and could affect DCAD levels.
  • Optimum DCAD range for prepartum cows is -8 to -12 meq/100g dry matter.
  • Feed BIO-CHLOR as a primary MP source in prepartum cow diets.

To learn more about BIO-CHLOR, your pit crew is standing by: contact your nutritionist, veterinarian or Arm & Hammer Animal Nutrition representative or fuel up at

Request Quote

Please complete the form below to request a quote for Bio-Chlor:

1. Robert Corbett. ARM & HAMMER™ Animal Nutrition, 2001. Data on file.
2. Hoover, Webster. Difference in feed intake pre- and postpartum, urine pH prepartum, and difference in production parameters postpartum for cows fed a control diet vs. a BIO-CHLOR containing diet (DCAD -10 meq/100 g DM) for 21 days pre-partum. ADSA Abstract, 1998.
3. Block E. Transition Cow Research – What Makes Sense Today? In: Proceedings. 2010
High Plains Dairy Conference; 75-98.
4. DeGroot MA, Block E, French PD. Effect of prepartum anionic supplementation on periparturient feed intake, health, and milk production. J Dairy Sci 2010:93:5268–5279.
5. Weich W, Block E, Litherland, NB. Extended negative dietary cation-anion difference
feeding does not negatively affect postpartum performance of multiparous dairy cows. J Dairy Sci 2013;96:5780-5792.
6. Miller-Webster TK, Hoover WH. Rumen Fermentation Profiling Laboratory Study, West
Virginia University, 2008. Data on file.
7. Each dairy began feeding BIO-CHLOR in April or May of 2007. Data on file.
8. Hoover, Webster. ADSA Abstract, 1998. Data on file.