Dairy Science Digest

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

  1. OCT 16

    DSD 6.10 | Summary of Social Housing for Calves

    Individual housing for pre-weaned calves has long been gold standard, since it was first introduced in the 40s. However, interest has emerged around paired and group housing for this phase of production. Intermittent research on this topic has been published over the past 25 years but has never been compiled, until now. Dr. Katarina Buckova from IA State University, and her team combed through research databases and compiled the results of several projects on paired housing, compared to individually housed calves. Research on production, health and behavior illuminated gaps in knowledge needed for producers to effectively move forward on this production practice. If your farm is considering paired or group housing, listen in for a compelling discussion about the impacts, perceived and measured, about how this calf development concept could impact the future of your herd. Topics of discussion 1:25      Introduction of Dr. Katarina Buckova   3:00      Why review / summarize paired housing research? 4:40      What age were calves paired   6:40       Performance & Health based observations of paired housing 7:49       Body weight gain 8:58       Table 11 – Summary of all metrics 10:04     Volume of milk fed 11:31     Feed conversion ratio     12:22     Did you see scours? 13:50     Possible negative effects of paired housing 14:49    “No effect” is still important information 16:13    Calf behavior differences, coping 18:58     Future research ideas 20:29     What do you want “boots on the ground” dairymen to learn from this project? 22:48     Discussion of paired vs group housing for new build 25:20     Paired housing presence in FARM program?  Featured Article: Invited review: A systematic review of the effects of pair housing on dairy calf welfare and productivity #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #dairycalf; #socialhousing; #pairedhousing; #hutch; #preweaning; #calfbehavior; #dairysciencedigest; #ReaganBluel

    30 min

  2. SEP 16

    DSD 6.9 | Surplus calves are a perishable commodity

    DSD 6.9 | Surplus calves are a perishable commodity This robust beef market is having a direct impact on the bottom line of dairy calf buyers and possesses the ability to radically impact dairymen’s bottom line long term through low all milk prices. This month we talk to researcher Dr. Sam Locke from The Ohio State University about a survey launched to help better understand the workings of the current calf buyers, jockeys and marketers. All sectors of this parallel and complementary production stream must work together for the dairy industry to generate a stronger, longer - lasting foothold in the beef industry. If done well through this opportunity, the dairy surplus calf market will establish a foothold in the beef supply chain. Listen in to hear insightful quotes from these Midwest calf buyers to help maximize your operation’s innate revenue stream. Topics of discussion 1:06       Paper Title: Understanding 1:40       Introduction of Dr. Sam Locke 2:39       Description of research participants who were being interviewed 3:42       Description of operations 5:07       What are surplus calves 6:09        Percent of Beef on Dairy vs. Holstein calves 7:10       Date of survey / market effect on responses 8:12       Themes of responses 9:36       Number one issue: Long distance transporting 11:31     Gathering calves – the route 12:42     Policies around calf transport in Canada 14:56     Premiums for ideal serum values 16:28     Expert advice needed 18:52     Opinions on vertical integration 21:33     Long term contributions to the beef industry going forward 22:39     Health challenges – consider vaccination 23:54     What do you want “boots on the ground” dairymen to learn from this project? 24:52     Budget impacts Featured Article: Understanding challenges and strengths in the post–dairy farm surplus calf value chain: An interview study #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #bullcalves; #beefondairy; #surpluscalves; #growers; #Calfjockey; #dairysciencedigest; #ReaganBluel

    28 min

  3. AUG 19

    DSD 6.8 | That is where you should put your money

    DSD 6.8 | That is where you should put your money For years researchers have sought out to better understand control mechanisms for a successful transition into lactation from the dry period. We’ve learned changing body condition score during the dry period is not acceptable, but what if it changes during late lactation?  How does this impact energy partitioning for the next lactation? Well managed high producing cows with high fertility might find themselves bred back in less than the “textbook ideal” condition score heading into the dry period. Can we alter the late lactation ration to successfully increase condition with little impact? Dr. Laura Hernandez from the University of Wisconsin worked with a team of researchers at the Forage Center to better understand what is happening if high energy is fed late in lactation through extensive data collection to determine the possible potential carry over effects for subsequent lactations. Listen into this compelling discussion as we learn more about the “black box” we know as the transition dairy cow and what phase to invest in to maximize your return. Topics of discussion 1:01       Goal of this month’s research 1:40       Introduction of Dr. Laura Hernandez 2:52       Why is this topic important 5:09       Test ration design for increasing BCS in late lactation 3.25 vs 3.75 8:45       Cow responses to the ration 11:05     Figure 1a: BCS change over 12 weeks 11:45     Dry matter intake 10:27     Possible hormonal responses causing the     13:49     Energy partitioning 16:12     Genetic analysis for response and non-response 18:40     Dry cow and early ration following treatment 19:19     High energy effect on dystocia 20:50     Early lactation energy measurements 22:45     Close up - Intake differences of high and low energy 23:23     Fig 3d: Early lactation intake difference 24:44     Visceral fat changes 26:54     Denovo fatty acids in milk, 70 days post treatment 30:54     Concentration of Megalac in treatment ration 31:57     Description of animals on treatment 32:47     What do you want “boots on the ground” dairymen to learn from this project? Featured Article: Effects of high-energy and low-energy diets during late lactation on the subsequent dry period and lactation of Holstein dairy cows #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #transition; #latelactation; #earlylactation; #dmi; #NEFA; #BHB; #drycow; #dairysciencedigest; #ReaganBluel

    35 min

  4. JUL 15

    DSD 6.7 | Diagnosing heifer mastitis

    It’s always exciting to watch a group of replacement heifers develop and anticipate their performance in the milking string as the top genetics of your herd. There is just about nothing more devastating than freshening them in to find mastitis or even worse, a blind quarter. When a first calf heifer calves in with a high somatic cell count she is more likely to maintain the high count, and more likely to be culled. Heifer mastitis, or intramammary infection (IMI), is a common affliction yet we know very little about what stage of production it occurs and how to best diagnosis the root of the problem.  Pamela Adkins, DVM at the University of Missouri worked with a team to capture culture samples from a variety of stages of heifer development to fabricate standard protocols for sample collection and help producers better understand how to circumvent this disease cycle for their herd. Listen in to learn how to improve heifer development and limit the tragedy of damaged replacements. Topics of discussion 1:51       Introduction of Dr. Pamela Adkins 2:26       Why is this topic important 4:17       Establishing standard sampling procedures 5:11       Cisternal puncturing 7:43       Comparison of sample collection 8:37       Grouping to determine when IMI begins in heifers 10:27     Causes and severity of infections 11:53     Feeding raw milk to hutch heifers 12:51     Normal microflora vs mastitis causing 15:36     If you have a heifer mastitis problem, what’s the next steps 17:21     What’s the best way to collect a sample? 18:44     Where to send aseptic samples 19:54     To freeze or not to freeze 21:48     Why were gestating heifers 8x as likely to have IMI? 23:05     What do you want “boots on the ground” dairymen to learn from this project? Featured Article: Evaluation of intramammary infection status in dairy heifers using cisternal and teat end sampling techniques #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #HSCC; #heifer; #milksampling; #culture; #mastitis; #IMI; #infection; #dairysciencedigest; #ReaganBluel

    25 min

  5. JUN 16

    DSD 6.6 | How much variation is allowable?

    DSD 6.6 | How much variability is allowable? Timing of insemination is still one of the most common question Dr. Paul Fricke, Extension faculty for the University of Wisconsin, gets from farmers. This month he and coauthors Vanda Santos and Paulo Carvalho  discuss the ideal timing of insemination when using popular artificial insemination protocols and when producers use estrus detection devices. Additionally, how does this change if you choose to use sexed semen or a straw of beef? Listen in to learn how to improve the pregnancies / AI metric in YOUR herd. Topics of discussion 1:36       Introduction of Dr. Paul Fricke, Vanda Santos and Paulo Carvalho 2:48       OvSync history (1995):  0, 8, 16, 24 or 32 hours - timing of insemination 6:39       Exp. 1: Study Design – 0 vs 16 hour  7:55       Conception reductions due to cosync 10:18     Exp. 2: Optimal time of sexed semen breeding 11:43     Fig. 4: CR of Beef vs sexed semen     13:24     P/AI Results, sexed semen 14:34     ReSync protocol - GGPPG 16:10    Exp. 3: Electronic estrus detection 18:00     Fig. 4: Conception, Early (0-2 hr) vs Late (20-25 hr) 19:49    Conception 13-23 hours after estrus detection 22:03     Raw data points on fig 3, Exp. 2 23:36     Fig 2: Early (0-2 hr) vs Ideal (15-16 hr) 24:27     Once a Day Breeding, killing the AM/PM rule 26:00     Expected pregnancy loss 28:49     What do you want “boots on the ground” dairymen to learn from this project?   Featured Article: Effect of timing of artificial insemination with conventional or sex-sorted semen on fertility of lactating dairy cows #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #conception; #ovsync; #doubleOvsync; #sexedsemen; #cosync; #resync; #pregnancyloss; #AM/PMrule; #dairysciencedigest; #ReaganBluel

    34 min

  6. MAY 16

    DSD 6.5 | Performance of High protein Corn coproduct

    For decades, ethanol production has generated affordable biproducts to feed. A new distilling method has generated a product with ~50% protein. Dr. Billy Brown, assistant professor of dairy science at Kansas State, wanted to understand how this feed would compare to soybean meal in a starter grain. To test this he developed rations substituting soybean meal 1:1. Graduate student Rachel Skinner measured intake, growth, effiency and metabolic and digestive parameters to best understand if this product would work in post weaning phase of production.   Topics of discussion 1:19       Introduction of Dr. Billy Brooks 3:18       Nutrient composition of high pro corn coproduct 5:14       Study Design 6:33       Limiting Amino Acids 7:53       Age of calves 8:34       Starter Digestibility    10:40     Average Daily Gain (ADG) 13:30     Insulin measurements 15:36     CP concentrations for the rations 16:25     Heat Stress 17:58     Dry matter intake and feed efficiency 19:05     Pelleting feasibility/stability 20:05     Yeast bodies – Impact, source of and future research efforts 22:53     What do you want Boots on the Ground dairy producers to gain from the project?  23:32     Breakeven analysis Featured Article: Effects of a high-protein corn coproduct as a replacement for soybean meal in calf starter feed in the postweaning period #2xAg2030; #journalofdairyscience; #openaccess; #MODAIRY; #HPCC; #dairycalves; #DDGS; # Protomax; #dairysciencedigest; #ReaganBluel;  #Rachel Skinner

    25 min

  7. APR 17

    DSD 6.4 | A dynamic rumen, preweaning

    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 Marcondes 2:50       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 cattle 8:17       Cobalt marker used in the research model    10:51     Rumen leakage for preweaned calves   13:14     Grain feeding during trial 14:30     Milk replacer vs Whole milk 17:01    Retention rates 18:41    Colostrum protocol – no tubing 20:02    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;

    31 min

  8. MAR 31

    DSD 6.3 | Big Picture Management Decisions Matter

    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 open 11:50     Figure 4: Impact of previous days open and previous days dry on cumulative milk 14:04     Risk of replacement and impact of mastitis 18:05     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;

    33 min
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About

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

Information

  • Creator
    reaganbluel
  • Years Active
    2020 - 2025
  • Episodes
    65
  • Rating
    Clean
  • Copyright
    © Copyright 2020 All rights reserved.
  • Show Website
    Dairy Science Digest

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