Tag: cattle

Diving into Diets: Phosphorus and Calcium in Lactating Beef Cows

Posted on by

In this episode of Diving into Diets, the discussion examines how different phosphorus and calcium diets affect phosphorus retention, milk composition, calf growth, and bone status in beef cattle. While cows on lower-phosphorus diets maintained milk production and calf growth in the short term, they mobilized phosphorus from bone, unlike cows on high-phosphorus, high-calcium diets. The takeaway is that cows are resilient and can tolerate short-term deficiencies, but inadequate long-term mineral intake may eventually impair performance, underscoring the need for appropriate supplementation.

Article Discussed: https://era.dpi.qld.gov.au/id/eprint/14721/1/AN24216.pdf

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Guest Dr. Christine Navarre, Liver Flukes, Emergency Preparedness

Posted on by

This episode of BCI Cattle Chat covers liver flukes and emergency preparedness in cattle operations with guest Dr. Christine Navarre. The experts discuss how liver flukes damage the liver, can contribute to sudden death, and may show up in feedlot cattle long after exposure in endemic regions. They emphasize accurate diagnosis, targeted deworming, and vaccination. The team also highlights the importance of planning ahead for disasters by ensuring access to water, feed, power, communication, and secure records to improve outcomes and protect both cattle and producers.

2:55 Liver Flukes 

12:03 Emergency Preparedness 

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Guest Information

A woman stands confidently in front of a cattle pen, wearing a pink shirt and blue jeans, smiling at the camera with cows in the background.

Adjunct Professor

Department of Veterinary Clinical Sciences

LSU School of Veterinary Medicine
Louisiana State University
Baton Rouge, LA 70803

Extension Veterinarian, LSU AgCenter

Professor, LSU School of Animal Sciences

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Herd Health: Synchronization Strategies for Heifers and Cows

Posted on by

This episode of Herd Health explores how cattle producers and veterinarians can choose the most effective estrus synchronization and fixed-time AI protocols for heifers and cows. Dr. Bob Larson explains that there is no single “best” protocol. Instead, the right choice depends on factors such as whether you are dealing with heifers or cows, time available, group size, handling logistics, and cost. The discussion highlights the roles of progesterone, GnRH, and prostaglandin, compares common protocols, and emphasizes using trusted resources such as the Beef Reproduction Task Force and working closely with veterinarians to ensure proper execution and consistent results.

Beef Reproduction Task Force

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Research Update: Liliana Rivas and Cow Efficiency

Posted on by

On this week’s BCI Cattle Chat episode, graduate student Liliana Rivas updates us on her research about leaky guts in yearling calves. She conducted this by feeding the calves a restricted diet and measuring indigestible sugars in the bloodstream over 36 hours. The experts also discussed cow efficiency, measured as pounds of calf weaned per pound of feed consumed per cow exposed. A key finding was that the nutrition models in the study underestimated the extent to which energy restriction harms reproduction.

3:10 Research Update 

12:27 Cow Efficiency 

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

After the Abstract: Predicting Bovine Respiratory Disease with Water Intake

Posted on by

In this episode of About the Abstract, Dr. Brad White and Dr. Todd Gunderson discussed a study that tested whether water intake can predict bovine respiratory disease (BRD). The study’s main finding was that water intake decreased 1–2 days before BRD treatment or diagnosis. The study also found that the amount of water consumed mattered more than the number of visits or the time spent at the waterer. The cattle treated multiple times for BRD consistently drank less water than healthy cattle. The main takeaway from the study was that monitoring water intake per visit to the waterer is more important than monitoring cattle behavior. 

Article Discussed: https://www.sciencedirect.com/journal/preventive-veterinary-medicine

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Managing Body Conditioning in Cows, Cause and Management of Weak Calves

Posted on by

The experts discussed whether it is more costly to have thin or fat cows going into the calving season. Thin cows are generally more costly because they are at high risk of having calving issues. Determining when to be aggressive with supplementation is important when addressing thin cows. The team also answered a listener’s question regarding weak calves. They discussed the factors that could be causing the calves to be weak. The key takeaway is that weak calves are associated with long or difficult births, weather stress, and poor nutrition. Better monitoring of heifers and calving progress can prevent many issues.

2:35 Thin vs Fat Cows

19:53 Weak Calves

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Diving into Diets: Volatile Fatty Acids

Posted on by

On Dividing into Diets, Dr. Brad White and Dr. Philip Lancaster explore how a ruminant’s diet influences the production of volatile fatty acids (VFAs), such as acetate, propionate, and butyrate, created through the fermentation of carbohydrates and proteins in the rumen. They explain that different types of feed support different bacterial populations, shifting the balance of VFAs. For example, grain-heavy diets boost propionate levels, while high-forage diets favor acetate. Despite these shifts, overall animal efficiency depends more on the total amount of volatile fatty acids produced than on the specific proportions. The experts note that attempts to manipulate VFA ratios can be expensive and often yield only minor improvements in productivity.

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

When to Start Treatment, Treatment Protocols, Antimicrobial Resistance

Posted on by

On this week’s BCI Cattle Chat episode, the experts debate whether you should start treatment as soon as signs of the disease appear or if you should wait for the signs to develop to have a clear diagnosis. The ability to modify the therapeutic plan can be valuable, but it needs to be balanced with consistency that allows better evaluation of treatment outcomes. The team also debated treatment protocols. Being flexible in planning is important, but deviations from the protocol should be kept to a minimum. Lastly, they discussed antimicrobial resistance and its role in the cause of death with respiratory diseases. 

2:37 When to Start Treatment 

10:03 Treatment Protocol

19:31 Antimicrobial Resistance 

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Epigenetics and Udder Quality

Posted on by

On this week’s BCI Cattle Chat episode, the experts answer a listener’s question comparing two genetically identical bulls raised in different environments. The group discusses whether early development and nutrition can influence fertility, longevity, or even the genetics passed on to offspring, diving into the emerging science of epigenetics. Lastly, the team tackles a listener question on udder quality, exploring how heritable udder traits are and when producers should use them as culling criteria in the herd.

3:13 Epigenetics

17:31 Udder Quality

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Herd Health: Estrus Synchronization Protocols in Heifers vs. Cows

Posted on by

On today’s episode of Herd Health, Dr. Brad White and Dr. Bob Larson discuss how to choose the best synchronization protocol for artificial insemination in cattle. They explain the differences between protocols for heifers and cows, including timing, hormone use, and management considerations. The discussion highlights the importance of resources like the Beef Reproduction Task Force website and factors such as chute time, cost, and herd size. 

Episode Resource: https://beefrepro.org/

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Herd Health: Heifer Selection Strategies

Posted on by

On Herd Health, Dr. Brad White and Dr. Bob Larson discuss a 2025 study in the Canadian Journal of Animal Science on factors influencing heifer replacement and cow-calf profitability. The study focused on cow feed efficiency, longevity, heterosis, and lifetime productivity. Key findings include the importance of longevity, with heifers staying longer in the herd being more profitable. Crossbreeding, particularly those with more heterosis, reduced costs. Residual feed intake (RFI) was crucial, with lower RFI cows being more efficient and cost-effective. The study used data from 2011 to 2018, accounting for economic fluctuations, and found no significant differences between breeds.

Article Discussed: https://www.researchgate.net/publication/385812533_Effects_of_cow_feed_efficiency_longevity_heterosis_and_lifetime_productivity_on_profitability_of_heifer_selection_and_cow-calf_operations 

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Dr. Dustin Pendell’s Trip to Taiwan, Fog Fever in Wyoming Cattle, Welfare Practices in Australia

Posted on by

On this week’s Cattle Chat episode, the experts answer a listener’s question that Dr. Todd Gunderson brought to the group from his recent trip to Wyoming. Listener Dr. Glenn Gamble asked the group’s opinion on how to combat Fog Fever. Dr. Dustin Pendell also shared with us about his trip to Taiwan. Lastly, Cameron Best from Australia answers some of Dr. Eduarda Bortoluzzi’s questions about how the welfare practices in Australia differ from those in the United States and Brazil. 

2:49 Fog Fever in Wyoming Cattle   

10:37 Dr. Dustin Pendell’s trip to Taiwan

16:38 Australian Welfare Practices 

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

About the Abstract: Bovine Coronavirus

Posted on by

Dr. Brad White and Dr. Todd Gunderson discuss a study on bovine coronavirus and its role in respiratory disease in cattle. The study, published in Frontiers in Veterinary Science, used a challenge model with 15 challenge calves and six control calves. Results showed higher viral shedding in challenge calves. PCR detected bovine coronavirus in multiple tissues but not in the lungs or tracheobronchial lymph nodes. Histopathology scores indicated more pathology in challenge calves, but clinical signs were mild. The study suggests bovine coronavirus may play a role in mild respiratory disease but not in severe pneumonia, possibly acting as a co-factor for secondary infections.

Article Discussed: https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2022.878240/full

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Research Update: Katherine Shirley, When to Preg Check, Guest: Cameron Best, Australia vs U.S. Beef Production

Posted on by

In this episode of Cattle Chat, Dr. Brad White and the team welcome graduate student Katherine Shirley, who discusses her summer research on heat stress and cardiopulmonary issues in feedyard cattle. She explains how environmental factors like temperature, humidity, and hide color can influence cattle health and mortality. The crew then answers a listener’s question about pregnancy checking, covering ideal timing, methods, and the causes of early pregnancy loss. Finally, Cameron Best from Australia joins to compare U.S. and Australian cattle production, highlighting differences in climate, forage systems, and market structures. 

2:42 Research Update from Katherine Shirley

8:09 When to Preg Check

19:55 Cameron Best Compares Australian and U.S. Beef Production

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Diving into Diets: Grazing Behavior

Posted on by

On this week’s episode of Diving into Diets Dr. Brad White and Dr. Philip Lancaster discuss a 2025 study on grazing behavior in cattle, focusing on factors like age, size, hide color, and forage quality. The study tracked 40 cows using GPS collars over three years, finding that older cows traveled further distances, possibly due to learning topography. Red cows traveled more in cold temperatures due to better heat retention from black hides. The study also noted that cows traveled further to high-quality forage areas, as measured by NDVI and IRG, and up slopes and to water sources. The study’s individual hypothesis testing approach limited the interpretation of confounding variables like production stage and weather.

Article Discussed: https://www.sciencedirect.com/science/article/abs/pii/S1871141325001258?via%3Dihub 

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Herd Health: Passive Transfer

Posted on by

Dr. Brad White and Dr. Bob Larson discuss the failure of passive transfer in beef herds, highlighting differences from dairy cattle. Risk factors included calves born to heifers, twins, and assisted births. Higher body condition scores in cows also correlated with lower IgG levels. The study emphasized the importance of colostrum intake, especially in high-risk situations. The discussion emphasizes the need for targeted management strategies in beef cattle.

Article Discussed: https://pmc.ncbi.nlm.nih.gov/articles/PMC2643452/

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Guest: Dr. Stephan Hughes, KSU Resources, Bull Fertility

Posted on by

In this week’s episode of Cattle Chat, Bob Weaber interviews Dr. Stephan Hughes, a veterinarian from South Africa, while on a trip. Hughes shares how he started listening to Cattle Chat and how beef production differs in South Africa. They also talk about the different tools Kansas State University has that can enhance your operation, not only in the United States but also abroad. The team then transitions to a listener question about bull fertility. The experts emphasize the importance of testing your bull’s fertility, especially as he ages. 

2:20 Dr. Stephan Hughes interview  

8:25 KSU Resources 

17:30 Listener Question: Bull Fertility  

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

About the Abstract: Antimicrobial Metaphylaxis Study

Posted on by

In About the Abstract, the experts discuss a study by Cordial and Carrie (2024) in the Journal of Animal Science, which compared the impact of metaphylaxis with Tulathromycin versus saline on high-risk beef stocker calves over 42 days. The study found that calves treated with Tulathromycin had higher average daily gain, especially in the first 14 days, and fewer treatments for respiratory disease. Culture results showed more bacteria in saline-treated calves at follow-up. Antimicrobial use was higher in the Tulathromycin group, but the number of regimens was similar. The study suggests that metaphylaxis may improve health and performance while managing antimicrobial resistance.

Featured Article: https://pubmed.ncbi.nlm.nih.gov/38126883

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Guest Dr. Cassandra Olds: What is Theileria, How is Theileria Transmitted, Heifer Development

Posted on by

In this episode of BCI Cattle Chat, guest Dr. Cassandra Olds continues the discussion of Theileria, a tick- and fly-borne parasite affecting U.S. cattle herds. The team explains how it spreads from the East Coast westward, causes anemia-like symptoms, and persists for life in infected animals. They stress prevention through stress reduction, parasite control, and good nutrition, noting that no approved treatment exists. The conversation shifts to preparing heifers for breeding season, emphasizing pre-breeding exams, tracking weight and reproductive readiness, and managing nutrition to ensure early conception and lifelong productivity.

Dr Cassandra Olds Contact Information:

34A Waters Hall
Manhattan KS 66506
Phone: (785) 706-8599
Fax: (785) 532-6232

colds@ksu.edu

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Tox Talk: Sudden Death in Fall-Calving Herd

Posted on by

In this Tox Talk episode, Dr. Brad White and Dr. Scott Fritz review a case involving six dead calves out of 38 fall-calving cow–calf pairs on pasture. The producer had not been checking the herd frequently, making the exact timeline of deaths unclear. With at least one calf estimated to have been dead for 4–5 days. They emphasize how decomposition, weather, and time since death affect necropsy value. Initial differential diagnoses focus on infectious causes and potential toxicities, given that only calves were affected.

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Guest: Dr. Cassandra Olds, Theileria, Theileria Transmission, Winter Feeding Strategies

Posted on by

This episode of Cattle Chat features guest Dr. Cassandra Olds, an entomologist, who shares with the group about her research on Theileria, an emerging protozoan parasite in cattle. Dr. Olds explains that Theileria is tick‑borne but can also be spread by sucking lice, possibly stable flies, limited placental transmission, and contaminated needles or equipment, emphasizing single‑needle use and the difficulty of vector control. The conversation then shifts to winter hay feeding strategy: estimating cow weights and forage intake, testing hay quality, minimizing waste, cleaning up old hay to reduce stable fly breeding sites, and tracking bale disappearance over time to adjust feeding and prevent cows from losing condition.

4:11 Theileria

5:25 Theileria Transmission

17:01 Winter Feeding Strategies

Hay Inventory Calculator | AgManager.info

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Guest Fred Gingrich, AVC, AABP, and Anaplasmosis

Posted on by

On Cattle Chat this week, Dr. Bob Larson, representing the Academy of Veterinary Consultants (AVC), and guest Dr. Fred Gingrich, with the American Association of Bovine Practitioners (AABP), discuss the work their organizations are doing. Anaplasmosis is also discussed, highlighting its transmission by ticks, the limitations of current control methods, and the importance of early veterinary intervention to manage the disease.

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Herd Health: Diagnosing an Aborted Fetus

Posted on by

Brad White and Dr. Bob Larson discuss a case where a client found an aborted fetus in their herd. Dr. Larson suggests identifying the aborting animal, collecting samples from the fetus, including the placenta, lung, liver, and brain, and holding them for further analysis. He emphasizes the importance of understanding the herd’s history, including the age and origin of the cows, and potential causes like Neospora, IVR, BVD, and feed contamination.

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS

Evolution in the Feedlot Industry, Questioning Cow Calf Practices, Big Cows vs Small Cows on Pasture

Posted on by

In this week’s episode of Cattle Chat, the experts discuss the evolution in the feedlot industry. They debate how producers used to calculate cost based on feed efficiency. The team also questions different cow-calf practices. Lastly, they debate whether or not you should have bigger cows with heavier weaned weight for your calves or if you should have smaller cows so there are more cows per acre, resulting in more calves being sold.  

3:10 Evaluation in the Feedlot Industry 

11:00 Questioning Cow Calf Practices 

15:50 Bigger Cows vs Smaller Cows on Pasture  

For more on BCI Cattle Chat, follow us on X at @ksubci, Facebook, and Instagram at @ksubci. Check out our website, ksubci.org. If you have any comments/questions/topic ideas, please send them to bci@ksu.edu. You can also email us to sign up for our weekly news blast! Don’t forget, if you enjoy the show, please go give us a rating!

Podcast: Play in new window | Download

Subscribe: Spotify | RSS

Herd Health: Weaned Calved with Bloody Diarrhea

Posted on by

On today’s episode of Herd Health, Dr. Bob Larson and Dr. Brad White talk about a ranch that reported weaned calves with bloody diarrhea after being mixed from four pastures. Coccidiosis was at the top of the list for possible issues, with other potential causes to look at. They discuss potential cases of bloody diarrhea and the ways to treat and prevent the issues. 

Podcast (bovine-science-with-bci): Play in new window | Download

Subscribe: Spotify | RSS