Article
Agriculture, Dairy & Animal Science
J. Perez-Baez, T. Silva, C. A. Risco, R. C. Chebel, F. Cunha, A. De Vries, J. E. P. Santos, F. S. Lima, P. Pinedo, G. M. Schuenemann, R. C. Bicalho, R. O. Gilbert, S. Rodrigez-Zas, C. M. Seabury, G. Rosa, W. W. Thatcher, K. N. Galvao
Summary: This study aimed to estimate the cost of metritis in dairy herds and found that metritis led to decreased milk production, reproduction, and survival, resulting in significant economic losses for dairy herds.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Joaquin Barca, Ynte H. Schukken, Ana Meikle, Pablo Chilibroste, Mette Bouman, H. Hogeveen
Summary: This randomized controlled trial examined the effects of pegbovigrastim (PEG) treatment on the partial net return of grazing dairy cows. The study found that PEG treatment increased the partial net return and resulted in an economic benefit of $210 ± $100 per cow per year. It also reduced the cost of treatment for clinical mastitis and numerically reduced the cost of culling.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
N. Browne, C. D. Hudson, R. E. Crossley, K. Sugrue, J. N. Huxley, M. Conneely
Summary: This study aims to investigate the causes and risk factors for lameness in partly housed, pasture-based dairy cows, and found that noninfectious lesions are more prevalent than infectious lesions, while also identifying correlations between different types of lesions.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
B. Lahart, L. Shalloo, J. Herron, D. O'Brien, R. Fitzgerald, T. M. Boland, F. Buckley
Summary: Breeding for increased Economic Breeding Index (EBI) improves greenhouse gas emissions per unit of product and nitrogen efficiency. Additionally, reducing concentrate supplementation decreases greenhouse gas emissions and increases nitrogen efficiency in pasture-based dairy production.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
N. Browne, C. D. Hudson, R. E. Crossley, K. Sugrue, E. Kennedy, J. N. Huxley, M. Conneely
Summary: This observational study aimed to identify cow-level and herd-level risk factors for lameness in a pasture-based system, based on predictors from the housing and grazing periods. Important risk factors for increased lameness prevalence were age and genetic predicted transmitting ability for lameness at the cow-level, and farm and herd size, infrastructure factors, presence of digital dermatitis, and farmers' perception of lameness as a problem at the herd-level. The findings provide valuable insights for future randomized clinical trials.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
S. H. Evers, L. Delaby, K. M. Pierce, B. McCarthy, E. L. Coffey, B. Horan
Summary: The study evaluates the effects of individual animal characteristics on cost-effective production efficiency parameter for dairy cows. It finds that dairy cow breed, genetic potential, milk production, body weight, daily total dry matter intake, and energy balance significantly affect production efficiency. Animals with higher efficiency produce more milk, have higher intake levels, and lower body weight.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Heather W. Neave, Christine L. Sumner, Roxanne J. T. Henwood, Gosia Zobel, Katie Saunders, Helen Thoday, Trevor Watson, James R. Webster
Summary: The study examined the views of New Zealand dairy farmers toward providing cow-calf contact, with concerns including animal welfare, labor and stress on staff, and system-level changes required. Small-scale farmers providing longer cow-calf contact emphasized the importance of animal welfare and health in their systems, while some conventional farmers expressed cognitive dissonance towards adopting such practices.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Joaquin Barca, Ana Meikle, Mette Bouman, Ynte H. Schukken
Summary: This study found that the impact of PEG treatment on fertility and culling interacts with pre-NEFA levels. In high pre-NEFA cows, PEG treatment increased the rate of first insemination, countered the negative effects of early-lactation CM and UD on pregnancy rates, and decreased the hazard of culling.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Reproductive Biology
Emmet T. Kelly, Conor G. McAloon, Luke O'Grady, J. Furlong, Mark A. Crowe, Marijke E. Beltman
Summary: The study found that in seasonal calving pasture-based systems, the accuracy of estrus detection was lower at first insemination but higher at repeat insemination. Factors such as absence of mounting abrasion may increase the risk of inaccurate estrus detection.
Article
Veterinary Sciences
N. Browne, C. D. Hudson, R. E. Crossley, K. Sugrue, E. Kennedy, J. N. Huxley, M. Conneely
Summary: This study aimed to determine the lameness prevalence and management practices on Irish pasture-based dairy farms. The results show that lameness prevalence was relatively low, indicating the benefits of a pasture-based system for animal welfare. However, there are areas for improvement in infrastructure and management practices.
IRISH VETERINARY JOURNAL
(2022)
Article
Agriculture, Multidisciplinary
Paul James Maher, Michael D. Murphy, Michael Egan, Patrick Tuohy
Summary: This study analyzed the impact of farm roadways on cow throughput in pasture-based grazing systems. The results showed that roadway width and surface condition score were positively associated with cow throughput. Public road crossings significantly reduced cow throughput. Additionally, the characteristics of farm roadways on commercial farms also affected surface condition score.
JOURNAL OF AGRICULTURAL SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Elena A. Sizova, Sergey A. Miroshnikov, Svetlana V. Notova, Alexey A. Tinkov, Anatoly V. Skalny
Summary: The objective of this study was to evaluate the levels of trace elements and minerals in the serum of cows transitioning from feedlot diets to grazing. Blood samples were collected from 30 healthy cows of the Red Steppe breed at the end of the feedlot period and during the pasture period. Serum levels of essential trace elements and minerals were analyzed using inductively coupled plasma mass spectrometry. The results demonstrated significant differences in the levels of various elements and minerals between the two feeding periods, indicating that feedlot and pasture rations have a significant impact on trace element and mineral metabolism in dairy cows.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2023)
Article
Agriculture, Dairy & Animal Science
Margit Bak Jensen, Laura E. Webb, Mette Vaarst, Eddie A. M. Bokkers
Summary: This study investigated the behavior of dairy cows during calving under spacious outdoor conditions and the effects of artificial hides on their selection of calving location. The results showed that primiparous cows tended to distance themselves further from the herd during calving and preferred to isolate themselves through distance rather than seeking artificial cover.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Jia Boh Tan, Nur Syakina Jamali, Wei En Tan, Hasfalina Che Man, Zurina Zainal Abidin
Summary: The study evaluated the techno-economic feasibility of an on-farm biogas system utilizing cow manure, demonstrating its ability to generate electricity and additional income for farmers.
Article
Veterinary Sciences
Natasha Browne, Muireann Conneely, Chris Hudson
Summary: Pain in the dairy industry is a significant concern for animal welfare. This study found that dairy farmers and veterinarians have different attitudes towards pain and the use of pain relief drugs in dairy cows. The use of non-steroidal anti-inflammatory drugs (NSAIDs) was found to be low relative to the pain scores. Continuing education on pain management and the benefits of analgesia is necessary to improve animal welfare.
FRONTIERS IN VETERINARY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
M. A. Crookenden, C. V. C. Phyn, S. A. Turner, J. J. Loor, A. Smith, V Lopreiato, C. R. Burke, A. Heiser, J. R. Roche
JOURNAL OF DAIRY SCIENCE
(2020)
Article
Agriculture, Dairy & Animal Science
M. Vailati-Riboni, M. Crookenden, J. K. Kay, S. Meier, M. D. Mitchell, A. Heiser, J. R. Roche, J. J. Loor
JOURNAL OF DAIRY SCIENCE
(2020)
Article
Agriculture, Dairy & Animal Science
S. Meier, L. R. McNaughton, R. Handcock, P. R. Amer, P. R. Beatson, J. R. Bryant, K. G. Dodds, R. Spelman, J. R. Roche, C. R. Burke
Summary: The study investigated the impact of genetic merit for fertility on puberty and reproductive performance in dairy heifers. It found that heifers with positive fertility breeding value reached puberty earlier and had higher pregnancy rates compared to those with negative fertility breeding value. The results suggest that genetic merit for fertility traits can affect heifer reproduction and may be useful for genetic selection in dairy farming.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Jonathan E. Barnsley, Chanjief Chandrakumar, Carlos Gonzalez-Fischer, Paul E. Eme, Bridget E. P. Bourke, Nick W. Smith, Lakshmi A. Dave, Warren C. McNabb, Harry Clark, David J. Frame, John Lynch, John R. Roche
Summary: This study uses New Zealand food consumption as a case study to explore the cumulative climate impact of adopting national dietary guidelines and substituting meat from hypothetical diets. The results show that transitioning to a hypothetical dietary guideline diet can reduce diet-related cumulative warming by 7 to 9%, while substituting meat items can further reduce it by 12% to 15%. However, the substitution of meat items results in characteristic nutrient differences that must be considered alongside changes in emission profiles.
Article
Agriculture, Dairy & Animal Science
S. Meier, B. Kuhn-Sherlock, P. A. Amer, J. R. Roche, C. R. Burke
Summary: The study found that cows with higher FertBV values had better uterine health, shorter calving to ovulation interval, higher submission rate, and higher pregnancy rate early in the breeding season.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
M. A. Crookenden, J. R. Roche, A. Heiser, B. Kuhn-Sherlock, C. D. Higham, C. V. C. Phyn, S-A Turner
Summary: One-time administration of Imrestor increased neutrophil numbers and function in dairy cows during the first 14 days postpartum. Using a lower dose rate of Imrestor or a single dose on the day of calving may be sufficient to improve neutrophil function in grazing dairy cows. Further large-scale field studies are needed to determine the impact of lower dose rates or the timing of immunological responses on animal health during early lactation.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
T. M. Grala, B. Kuhn-Sherlock, J. R. Roche, O. M. Jordan, C. V. C. Phyn, C. R. Burke, S. Meier
Summary: The peripartum metabolism and subsequent reproductive performance of dairy cows are linked, with poor adaptation over the transition period associated with lower reproductive success. This study investigated the differences in metabolic profiles during the first postpartum transition period in primiparous heifers and found that longer postpartum anestrous intervals were associated with greater metabolic dysfunction. Overall, the results demonstrate the significant effects of genetic merit for fertility traits on peripartum metabolic status.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
O. K. Spaans, B. Kuhn-Sherlock, A. Hickey, M. A. Crookenden, A. Heiser, C. R. Burke, C. V. C. Phyn, J. R. Roche
Summary: The physiology of transition cows from pregnancy to lactation is complex and has significant implications for disease, economic losses, and animal welfare. Most studies have focused on cows fed total mixed rations, while research on grazing cows is limited. This study compiled a database of 2,610 lactations from pasture-based dairy cows in New Zealand to examine the profiles of blood analytes and physiological indicators during the transition period. The results showed that moderate-yielding cows undergo similar changes to high-yielding cows during transition, but differences in diet composition lead to higher concentrations of beta-hydroxybutyrate (BHB) than expected.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
T. M. Grala, B. Kuhn-Sherlock, M. A. Crookenden, C. G. Walker, J. R. Roche, M. D. Price, C. R. Burke, S. Meier
Summary: This study investigated the associations between adaptive immune responses and reproductive phenotypes, and found that adaptive immune response has positive effects on fertility. The interaction effects between genetic merit for fertility traits and immune ranking on reproductive phenotypes were also observed when cows were ranked by overall immune response.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
M. A. Crookenden, A. V. R. Lake, C. R. Burke, J. T. Pratt, M. D. Mitchell, C. V. C. Phyn, J. R. Roche, A. Heiser
Summary: Chronic postpartum uterine infection has a negative impact on fertility. NSAIDs are commonly used to alleviate pain and treat inflammation in transition dairy cows. To study uterine inflammation without animal experiments, an in vitro model using cultured bovine endometrial epithelial cells was established. The effectiveness of 5 NSAIDs in dampening inflammation was measured by ELISA, and meloxicam, flunixin meglumine, and tolfenamic acid were found to be successful. Further gene expression analysis revealed downregulation of genes involved in chemokine signaling and the eicosanoid pathway. These findings suggest that these NSAIDs should be investigated for the treatment of postpartum uterine inflammation.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Murray D. Mitchell, Mallory A. Crookenden, Kanchan Vaswani, John R. Roche, Hassendrini N. Peiris
ANIMAL PRODUCTION SCIENCE
(2020)
Article
Agriculture, Dairy & Animal Science
Mark Neal, John R. Roche
ANIMAL PRODUCTION SCIENCE
(2020)
Article
Agriculture, Dairy & Animal Science
C. Poole, D. J. Donaghy, R. R. White, J. R. Roche
ANIMAL PRODUCTION SCIENCE
(2020)
Article
Agriculture, Dairy & Animal Science
S. J. Hendriks, C. V. C. Phyn, S. -A. Turner, K. R. Mueller, B. Kuhn-Sherlock, D. J. Donaghy, J. M. Huzzey, J. R. Roche
ANIMAL PRODUCTION SCIENCE
(2020)
Article
Agriculture, Dairy & Animal Science
B. Horan, J. R. Roche
ANIMAL PRODUCTION SCIENCE
(2020)