Changes in feeding behavior patterns and dry matter intake before clinical symptoms associated with bovine respiratory disease in growing bulls
Abstract
Methods to improve accuracy of preclinical detection of bovine respiratory disease (BRD) are needed to reduce the economic impact of this disease, improve animal welfare, and promote more judicious use of antimicrobials in beef cattle. The objectives of this study were to retrospectively characterize time-series deviations in DMI and feeding behavior patterns preceding the display of observed clinical symptoms associated with BRD and to identify those feeding behavior traits that would be most predictive of BRD. The study was conducted with 231 seed stock bulls (391 ± 55 kg initial BW) representing 5 breeds that were housed in a facility equipped with GrowSafe feed bunks at a commercial bull-test facility. All bulls were vaccinated against standard viral and bacterial pathogens before and on arrival at the facility. Daily DMI and feeding behavior traits (frequency and duration of bunk visit events, head-down duration, variance of nonfeeding intervals, and time to approach feed bunk following feed-truck delivery) were measured for 70 d with a GrowSafe system. During a 10-d period from Day 28 to 37 of the trial, 30 bulls were administered antimicrobial therapy for clinical symptoms of BRD (rectal temperatures > 39.5°C). All remaining bulls ( = 201) were administered metaphylactic therapy on Day 38 of the trial in response to an acute decrease in feed intake. A retrospective analysis was conducted using a 2-slope broken-line regression model to identify inflection points in DMI…
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Research using a fractional slope linear regression model revealed fluctuations in feeding rates of growing bulls preceding BRD onset.
“Research using a fractional slope linear regression model revealed fluctuations in the feeding rates of growing bulls preceding BRD onset. [98].”
From Strategies for Bovine Respiratory Disease (BRD) Diagnosis and Prognosis: A Comprehensive Overview (2024) · cites this paper as [98]
An uptick in feed intake was noted before clinical symptoms became apparent in bulls.
“Notably, an uptick in feed intake was noted before clinical symptoms became apparent in bulls.”
From Strategies for Bovine Respiratory Disease (BRD) Diagnosis and Prognosis: A Comprehensive Overview (2024) · cites this paper as [98]
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- Authors
- Jackson, K. S., Carstens, G. E., Tedeschi, L. O., & Pinchak, W. E.
- Affiliations
- Texas A&M University (US)
- Corresponding author
- Carstens, G. E.
- Venue
- Journal of Animal Science
- Publisher
- Oxford University Press (OUP)
- Published
- 2016-04-01
- Volume
- 94
- Issue
- 4
- Pages
- 1644-1652
- ISSN
- 0021-8812 (ISSN-L)
- 1525-3163
- OpenAlex
- W2338979271
- Cited by
- 38
- References
- 26
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 2 · 2023: 1 · 2022: 4 · 2021: 9 · 2020: 7 · 2018: 8 · 2017: 4
- FWCI
- 4.12
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Animal Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Immunology and Microbiology › Microbiology › Microbial infections and disease research
- Health Sciences › Veterinary › Small Animals › Animal health and immunology
- Health Sciences › Veterinary › Small Animals › Animal Behavior and Welfare Studies
- Keywords
- bovine respiratory disease, preclinical detection, feeding behavior, dry matter intake, broken-line regression, metaphylactic treatment, beef cattle, antimicrobial use reduction, disease onset prediction, headspace volatile compounds
- MeSH terms
- Animals, Anti-Bacterial Agents, Cattle, Feeding Behavior, Male, Models, Biological, Retrospective Studies, Bovine Respiratory Disease Complex
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