Results 1 to 10 of about 55,813 (284)

Preweaned heifer management on US dairy operations: Part V. Factors associated with morbidity and mortality in preweaned dairy heifer calves

Journal of Dairy Science, 2018
The objective of this study was to evaluate morbidity and mortality in preweaned dairy heifer calves based on different health, feeding, and management practices, as well as environmental factors. This study was conducted as part of the calf component of
N. Urie, N. Urie, J. Lombard, C. Shivley, C. Shivley, C. Kopral, A. Adams, A. Adams, T. Earleywine, J. Olson, F. Garry   +10 more
exaly   +2 more sources

Preweaned heifer management on US dairy operations: Part I. Descriptive characteristics of preweaned heifer raising practices

Journal of Dairy Science, 2018
The objective of this study was to describe preweaned dairy heifer calf management practices on dairy operations across the United States that were used to analyze factors associated with colostrum quality and passive transfer, Cryptosporidium and ...
N. Urie, J. Lombard, C. Shivley, C. Kopral, A. Adams, A. Adams, T. Earleywine, J. Olson, F. Garry   +8 more
exaly   +2 more sources

Identification of Loci and Pathways Associated with Heifer Conception Rate in U.S. Holsteins

Genes, 2020
Heifer conception rate (HCR) is defined as the percentage of inseminated heifers that become pregnant at each service. The genome-wide association analyses in this study focused on identifying the loci associated with Holstein heifer (n = 2013 ...
Jennifer N Kiser, Christopher M Seabury, João G N Moraes   +2 more
exaly   +2 more sources

Canadian National Dairy Study: Heifer calf management

Journal of Dairy Science, 2018
In the past decade, substantial changes have occurred in the way dairy heifer calves are managed. The objectives of this study, part of phase I of the 2015 Canadian National Dairy Study, were to examine heifer calf health and adoption of rearing ...
Charlotte B Winder, Cathy A Bauman, Todd F Duffield   +2 more
exaly   +2 more sources

Heifer fertility and carry over consequences for life time production in dairy and beef cattle

Animal, 2014
The rearing period has a key influence on the later performance of cattle, affecting future fertility and longevity. Producers usually aim to breed replacement heifers by 15 months to calve at 24 months. An age at first calving (AFC) close to 2 years (23
D. Wathes, G. E. Pollott, K. F. Johnson, Harriet Richardson, J. Cooke   +4 more
exaly   +2 more sources

Meta-Analysis of Heifer Traits Identified Reproductive Pathways in Bos indicus Cattle

Genes, 2021
Fertility traits measured early in life define the reproductive potential of heifers. Knowledge of genetics and biology can help devise genomic selection methods to improve heifer fertility. In this study, we used ~2400 Brahman cattle to perform GWAS and
M. S. Tahir, L. Porto-Neto, C. Gondro, Olasege B. Shittu, K. Wockner, Andre W L Tan, H. Smith, G. Gouveia, J. Kour, M. Fortes   +9 more
semanticscholar   +1 more source

Genomic evaluation of dairy heifer livability.

Journal of Dairy Science, 2021
Differences in breeds and sire lines suggest the presence of a genetic component for heifer livability (HLIV). Genomic evaluation for this trait can increase profitability and improve animal health and welfare.
M. Neupane, J. Hutchison, C. V. Van Tassell, P. Vanraden   +3 more
semanticscholar   +1 more source

The age at first consumption of forage in calves and its effect on growth and rumination in the short- and long-term

Journal of Animal Science and Biotechnology, 2023
Background Previous investigations into the effect of dietary forage on calf performance have been inconsistent, and there is a paucity of information exploring the effect of age on the growth performance and rumination of calves.
Jianxin Xiao, Tianyu Chen, Rong Peng, Gibson Maswayi Alugongo, Hui Yang, Muhammad Zahoor Khan, Shuai Liu, Yulin Ma, Jingjun Wang, Wei Wang, Yajing Wang, Shengli Li, Zhijun Cao   +12 more
doaj   +1 more source

Postbreeding Heifer Management [PDF]

Veterinary Clinics of North America: Food Animal Practice, 2013
Rebreeding performance of the first-calf heifer has major economic consequences for cow-calf producers. Management systems that allow heifers to cost-effectively achieve a body condition score of 5 to 6 at calving and maintain this through rebreeding have a higher probability of pregnancy success.
Sandy K, Johnson, Richard N, Funston
openaire   +2 more sources

Residual feed intake divergence during the preweaning period is associated with unique hindgut microbiome and metabolome profiles in neonatal Holstein heifer calves

Journal of Animal Science and Biotechnology, 2020
Recent studies underscored that divergence in residual feed intake (RFI) in mature beef and dairy cattle is associated with changes in ruminal microbiome and metabolome profiles which may contribute, at least in part, to better feed efficiency.
A. Elolimy, A. Alharthi, M. Zeineldin, C. Parys, J. Loor   +4 more
semanticscholar   +1 more source