by reaganbluel
Dairy Science Digest - a podcast developed to share the MOST current research published in the Journal of Dairy science. Hear directly from the research authors on how their results can impact your herd’s profitability. Science you can base your management decisions around. Designed to rarely exceed 30 minutes, this podcast provides ONLY the ”need to know” info for dairy producers. Keywords: dairy, science, reproduction, production, extension, cattle, MIZZOU, MU, Dairy Team, #2xAg2030
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🇺🇲
Publishing Since
5/14/2020
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April 17, 2025
Most dairy farms are trying to push the envelope from the conventional 4L of milk replacer per day to a higher volume to support lean structural growth of replacement heifers. Concerns of ruminal leakage resulting in fermentation has been cited as a concern, but is that based on an incomplete picture? We know microbial protein offers a nearly perfect alignment of amino acid requirements for the bovine, however nutrition programs have discounted milk replacer to exclusively providing rumen undegradable protein (RUP) – protein that skips the rumen and is absorbed in the abomasum. Marcos Marcondes, researcher from the Miner Institute, wanted to see if feeding higher volumes would change the flow of protein and energy to the calf and the physiology of the rumen, due to leakage. To test this question he fed a standard rate and double rate of milk replacer with colbalt to mark and track the flow of digestion through preweaned animals. Leakage was found in the rumen on both treatments, but the results were positive. Energy, in the form of volatile fatty acids, and microbial protein added to the fuel for these growing animals. Listen in to better understand the kinetics of digestion and questions that still remain for this phase of production. Topics of discussion 1:44 Introduction of Dr. Marcos Marcondes2:50 Lambs as a model for bovine calves, 4 & 8L/day 4:07 Known info on the kinetics of milk protein 6:46 Relevance of microbial protein in fueling cattle8:17 Cobalt marker used in the research model 10:51 Rumen leakage for preweaned calves 13:14 Grain feeding during trial14:30 Milk replacer vs Whole milk 17:01 Retention rates 18:41 Colostrum protocol – no tubing20:02 VFA and Microbial protein production 25:37 Physiology and histology 27:32 What do you want Boots on the Ground dairy producers to gain from the project? Featured Article: Influence of different amounts of milk replacer on esophageal leakage, rumen fermentation characteristics, gastrointestinal tract passage rate, and microbial crude protein synthesis of nursling animals #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #prewean; #dairycalves; #microbialprotein; #MinerInstitute; #kinetics; #dairysciencedigest; #ReaganBluel;
March 31, 2025
DSD 6.3 | Big Picture Management Decisions Matter Timeless dairy management decisions, such as voluntary waiting period & days dry, have recently been the topic of interest across the globe. Scrutiny to illuminate the ideal to maximize productive life has left the industry questioning convention. Michael Overton, DVM at Zoetis worked with co-author Steve Eicker to tease out the answers to these questions from a a massive dataset of 109,000 cows across 60 herds nationwide. This retrospective, observational research project was recently published in the Journal of Dairy Science titled, “Associations between days open and dry period length versus milk production, replacement, and fertility in the subsequent lactation in Holstein dairy cows”. All dairymen should pause to determine the unintended consequences of their management decisions on optimal performance and ultimately the economic success of the herd. Listen in to learn ways to apply concepts from this project to your operation. Topics of discussion 1:33 Introduction of Dr. Overton 2:54 Difference between association vs causation 4:28 Description of data set 4:51 Genomic testing, background 6:31 Advising herds on selection indices DWP$10:02 Different measurements collected – carry over impact of days dry and days open11:50 Figure 4: Impact of previous days open and previous days dry on cumulative milk 14:04 Risk of replacement and impact of mastitis18:05 How many sins is a dairyman willing to forgive? 19:46 What does your data say for optimal VWP 22:27 Twin events or sex of calf 24:59 Figure 7: Risk of pregnancy 28:46 What do you want Boots on the Ground dairy producers to gain from the project? Featured Article: Associations between days open and dry period length versus milk production, replacement, and fertility in the subsequent lactation in Holstein dairy cows #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #daysdry; #milk; #previousdaysopen; #VWP; #daysdry; #DWP$; #Zoetis; #dairysciencedigest; #ReaganBluel;
February 16, 2025
Colostrum, the life-giving liquid-gold first milk that builds the calves’ immune function. The dairy industry has made amazing strides on colostrum management, however we’ll always have a small number of cows that come in with enough colostrum, just moderate quality. What can we do to enhance the colostrum to ensure the calf’s success? Dr. Sandra Godden, from the University of MN Vet Med, and her team of researchers sought to better understand what would happen if they directly added dry colostrum replacer to the moderate quality colostrum? Is it better to reconstitute and feed separately? Listen in to learn ways to improve your colostrum program and how to enhance that moderate quality colostrum. Topics of discussion 1:47 Introduction of Dr. Sandra Godden2:29 Experimental design and “why” for the project 4:23 Efficiency of absorption 4:55 Abomasal emptying relative to osmolality 7:56 4 treatments 9:52 IgG concentrations at time 0 (Table 3) 10:52 Results discussion - IgG at 24 hours 12:21 General discussion of plasma derived colostrum vs maternal derived replacer15:05 Discussion of the actual product you used and how it is different from other products on the market17:45 Impact on health, behavior and appetite for the first 3 days 20:46 Importance of Total Coliform Counts (TCC) in colostrum and how to test25:26 What do you want Boots on the Ground dairy producers to gain from the project? 26:26 Goals for serum brix readings and serum total protein Featured Article: Controlled Field Study Investigating Two Methods of Enriching Moderate-Quality Maternal Colostrum on Transfer of Passive Immunity and Wellbeing of Neonatal Dairy Calves #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #colostrum; #colostrumreplacer; #colostrumenhancement; #premolac; #Zinpro; #dairysciencedigest; #ReaganBluel;
Wisenetix
ADSA
Wisenetix
Balchem Animal Nutrition & Health
Progressive Dairy editors
University of Minnesota Extension
The Dairyland Initiative
Damian Mason
TED
Peggy Coffeen
Teagasc
Farmers Weekly
STgenetics
Freakonomics Radio + Stitcher
Dr. Jordan B. Peterson
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