Dairy Science Digest
DSD 3.11 | Ultrasound assessment of pneumonia

DSD 3.11 | Ultrasound assessment of pneumonia

November 15, 2022

Bovine respiratory disease (BRD) is a costly concern primarily during the calf phase production. This is especially relevant to veal production, when young and venerable calves are commingled from many farms. However, BVD breakouts can also occur on calf ranches raising dairy x beef calves or even individual dairy farms.

This month Dr. Stan Jourquin joins us from Ghent University in Belgium to discuss his article is titled, “Dynamics of subclinical pneumonia in male dairy calves in relation to antimicrobial therapy and production outcomes”. Listen in to learn how pneumonia might be lurking in your herd without your knowledge.

Consider ways to use ultrasound as a tool to quickly and reliability assess animals upon receipt to allow for differential management. Overall losses, from chronically ill animals, could be decreased by warding off the spread of infection and promoting early cure. Once lungs are severely consolidated, these animals are 4.2x more likely to become chronic and experience -0.25 lbs average daily gain over this phase of production.

For more information visit:
Open access Journal article: https://www.journalofdairyscience.org/article/S0022-0302(22)00644-0/fulltext 
UC Davis BRD Clinical symptom scoring system: https://www.vmtrc.ucdavis.edu/sites/g/files/dgvnsk5141/files/local_resources/pdfs/BRD_ANR_Brochure_Nov%202016%20FINAL.PDF



#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.10| Fetal programming effects of Choline

DSD 3.10| Fetal programming effects of Choline

October 15, 2022

Fetal programming is an emerging topic. This month listen in to learn more about how feeding Choline to your transition pen could transform the metabolism and next generation of the herd. Researcher Dr. Tucker Swartz at the Michigan State University and his team in Bradford’s lab fed choline 24 days prior to freshening and measured the impact on the calf's success through the preweaning phase. These results are in press in the Journal of Dairy Science titled, “Effects of prenatal dietary rumen-protected choline supplementation during late gestation on calf growth, metabolism, and vaccine response.”

They found impacts in the energy metabolism and immune function. Listen in for more information on how this affordable addition holds a large ROI on this phase of production and more.

#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.9| Turn methane from a liability into an asset

DSD 3.9| Turn methane from a liability into an asset

September 15, 2022

While it is a fairly unpopular topic among most dairymen, the carbon neutrality goal for 2050 has been declared by leaders of the dairy industry to ensure we are meeting the desires of consumers. This month Dr. Frank Mitloehner joins us from UC Davis to discuss his article is titled, “Defining a pathway to climate neutrality for US dairy cattle production”. Listen in to learn how this goal can become an asset to your balance sheet, through carbon credits on the open market.

We discuss the State of California and their relationship with their dairy industry as a case study. The ultimate result of an investment of public money has propelled CA dairy producers toward the goal of a 40% decrease in dairy methane by 2030.

Revenues generated from the methane digesters result following the conversion of gas into a useable fuel for vehicles and the sale of carbon credits on the open market. Listen in to better understand the ideal size of operation, costs of install, annual assets and how to be part of the climate solution while cashflowing.  

Dr. Mitloehner can be found on Twitter at: https://twitter.com/GHGGuru and https://twitter.com/UCDavisCLEAR.

For more information visit:

https://youtu.be/UOPrF8oyDYw and

#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.8 | The high fertility cycle

DSD 3.8 | The high fertility cycle

August 15, 2022

This month Drs. Keith E. Latham and J. Richard Pursley join us from Michigan State University to discuss their research comparing cows that maintained body condition versus those who lost during the first month of lactation, and the impact that has on reproductive success.

Dairy producers are familiar with the struggles cows have when the transition period fails and cows thin down. Turns out these researchers identified part of the reproductive puzzle, a molecular change on the oocyte which potentially explains poor fertility for those who loose condition.

Listen in as Dr. Pursley describes the “High fertility cycle” your herd can experience when all the puzzle pieces fall in place. He’ll provide reproductive benchmarks to assess to ensure your herd avoids over conditioning and therefore improve reproductive performance in the following lactation.

This month’s feature article “Effects of early lactation body condition loss in dairy cows on serum lipid profiles and on oocyte and cumulus cell transcriptomes” is found here in the Journal of Dairy Science. For more information about Bovine Reproduction, visit the MSU Bovine Reproductive management website at: https://dairycattlereproduction.com/


#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY


Figure 6 - Referenced in the DSD 3.8 Figure_6bsgde.jpg

DSD 3.7 | Is She Settled?

DSD 3.7 | Is She Settled?

July 14, 2022

How much would you value knowing that she’s bred earlier than convention? Canadian researcher Dr. Jean Durocher and his team at DHI was approached by dairy producers to determine the feasibility of weekly milk PAG testing all the way down to 23 days post insemination, potentially helping resync and rebreed her a week earlier.

The cost of days open can range from $3.00-$5.50/cow/day. Knowing her status sooner will assist in decreasing these costs.

This month’s feature article “Bayesian estimation of sensitivity and specificity of a milk pregnancy-associated glycoprotein ELISA test for pregnancy diagnosis between 23 and 27 days after insemination in Holstein dairy cows” found here.


#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.6 | Not your Grandfathers Sorghum

DSD 3.6 | Not your Grandfathers Sorghum

June 15, 2022

This timely edition addresses questions about the feasibility of Forage Sorghum and Sorghum Sudangrass for your lactating herd. There have been numerous advances to these forages over time resulting in hybrids. Dr. Luis Ferraretto, from the University of Wisconsin, is featured for this June addition to discuss a retroactive study predicting dry matter intake, milk production, and production’s impact on intake using 11 years of sorghum plot data from Central FL.  

Listen in to better understand the effect of planting season and ways to navigate using these "improved” forages in your dairy’s program.

Could this forage fit and fill an opportunity to improve tonnage of home grown forage and in your operation? A carefully crafted TMR including forage sorghum could result to be a decreased reliance on purchased nutrients while maintaining your typical milk production levels.

The featured Journal of Dairy Science article titled: “Effects of season, variety type, and trait on dry matter yield, nutrient composition, and predicted intake and milk yield of whole-plant sorghum forage” is found at https://www.journalofdairyscience.org/article/S0022-0302(22)00293-4/fulltext

#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.5 | Modeling biometrics benchmarks for a successful transition cow management

DSD 3.5 | Modeling biometrics benchmarks for a successful transition cow management

May 15, 2022

The transition period has been investigated for nearly 4 decades. Over this time, much has changed in dairy industry including herd management and genetics. Dr. Kerwin, from Cornell, joins us today to discuss the robust observational project documenting the management of 72 successful herds in NY and VT. The project involved tracking the same cohort of cows on each farm for 11 weeks to capture the far off, close up, fresh and peak lactation cow over time.

Part 1 of the paper focuses on the management of the herds within the existing farm infrastructure. These topics including grouping dynamics, fresh cow checks and stocking density and how these parameters impact biomarkers (NEFA, βHB and haptoglobin).

Beginning at 20:44, she discusses how the biomarkers effect the health, production and reproductive success of the herd. Their model identified an association between the biomarkers and production, negative health disorders, and reproduction (25:13).

Don't miss this foundational herd biomarker benchmarking paper for understanding your transition pen goals - Listen in now! **apologies for the sound quality due to poor internet connectivity** Next episode will be better!

HERD ALARM LEVELS: (multi= mature cows, primi = first calf heifers, Pre=Prepartum, post=postpartum)

when >30% multip cows sampled are >0.17 mmol/L = 6% increase disease
              21d PR:    >15% multi – 6% decrease 21d PR
                               > 40% primi – 3.9% decrease 21d PR

POST NEFA: >0.59mmol/L          
> 15% Multi: 5.8%
              > 15% Primi: 4.2% increase in disorder

Post NEFA 305ME Milk –
Multi: >30% = >0.48 mmol/L decreased milk 1735lbs
              Primi – Not Significant  

POST BHB: >15% @ >1.2mmol/L
              8.5% increase disorder
              305ME Milk:
                             Multi: >10% +229kg
                             Primi: >20%  +332kg
              21d PR: >15%, >0.9 mmol/L
                             3.2% decrease
              Prob of Preg -
5.2% decrease
              PRFS –
7.0 % decrease

POST HAPLOGOBIN: >20%, >0.45g/L = 5.3% increase in disorder incidence

Two companion articles were featured. These are found at:
Part 1: https://www.journalofdairyscience.org/article/S0022-0302(22)00243-0/pdf
Part 2: https://www.journalofdairyscience.org/article/S0022-0302(22)00244-2/pdf  

#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.4 | Under the hood

DSD 3.4 | Under the hood

April 15, 2022

The final frontier for ruminant nutritionists - understanding all the intricacies and nuances of the microorganisms in the rumen. We know the rumen is adaptable and must anticipate these changes to better manage our herd. This month we talk with Dr. Mary Beth Hall, US Dairy Forage Research center, who investigated the relationship of non-fibrous carbohydrates and rumen degradable protein in the rumen and on production.

In 2022, we anticipate nutritionists will try out a variety of different energy sources throughout 2022, due to the challenging commodity markets. The research team specifically looked at feeding different rates of molasses (sugar) or ground corn (starch) when in the presence or absence of rumen degradable protein. She describes the results when her team  ‘looked under the hood’.

Listen in for this timely understanding of what to expect when shifting from a starch to a sugar and how to best manage ‘under the hood’ to keep your herd running smoothly.

Two companion articles were featured. These are found at: https://www.journalofdairyscience.org/article/S0022-0302(22)00187-4/fulltext

#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.3 | Financial Resilience – the individual cow effect

DSD 3.3 | Financial Resilience – the individual cow effect

March 21, 2022

Positive Profit. Every herd is chasing financial resilience. It is especially relevant on our minds having just completed our schedule Fs and planning for 2022 planting season.

Have you ever wondered the lifetime profit of a cow in your herd? How about the average break even for each cow in the herd? Dr. Hadrich was raised on a dairy and questioned the impact of these individual cow differences. To answer these questions, she and her team took on-farm quickbook financials and merged them with individual cattle DHIA data from 67 Minnesota herds. This information maps out the cow-level cumulative lifetime break-even impact on financial assessment.  

Individual cow lifetime profit between “resilient” and “non-resilient” herds is compared. Lifetime expenses varied substantially, between the two. These differences were found across farm sizes, heifer development costs, lifetime feed and “non-feed” expenses (which includes labor).

Listen in to hear how you can assess the financial resilience of your herd!

The full article is found at: https://www.journalofdairyscience.org/article/S0022-0302(22)00137-0/fulltext   

#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRY

DSD 3.2 | Unleashed Energy

DSD 3.2 | Unleashed Energy

February 15, 2022

The hurdles of the transition period were first identified nearly 3 decades ago. Since then, researchers have been working towards improved understanding of adipose tissue metabolism to fuel the dairy cow during this window of time.

This month we interview the author of the Symposium Review titled: The role of adipose tissue in transition dairy cows: current knowledge and future opportunities, Dr. Sabine Mann, DVM from Cornell University.

We discuss the effects of and how to monitor circulating NEFAs during early lactation. Dr. Mann’s article is an extensive review of this topic and provides obtainable management practices to help your transitioning herd.

The full article is found at: https://www.journalofdairyscience.org/article/S0022-0302(21)01110-3/fulltext

#2xAg2030; #journalofdairyscience; @jdairyscience; #openaccess; #MODAIRYOn_farm_opportunities_9ng38.png

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