Understanding How Stress Affects Dairy Calves' Growth
Author Information
Author(s): Cotticelli Alessio, Bifulco Giovanna, Giombolini Matilde, Pividori Isabella, Calanni Macchio Alfio, Neglia Gianluca, Corazzin Mirco, Prandi Alberto, Peric Tanja
Primary Institution: Federico II University, Naples, Italy
Hypothesis
The study investigates the relationship between management practices, HPA axis functioning, and growth performances in preweaning dairy calves.
Conclusion
The study concluded that diseases during the preweaning period and the duration of individual housing negatively impact calves' growth.
Supporting Evidence
- The occurrence of diseases during the preweaning period was negatively correlated with body weight at 60 days.
- Calves that spent more time in individual housing had lower body weights.
- The hair cortisol-to-DHEA(S) ratio was negatively correlated with daily weight gain.
Takeaway
This study shows that how we take care of baby cows can really affect how big and healthy they grow, especially if they get sick or are kept alone.
Methodology
The study included a retrospective cohort study of 914 calves and a prospective study of 60 calves and their dams, measuring growth performances and health outcomes.
Potential Biases
The observational nature of the study limits the ability to establish cause-and-effect relationships.
Limitations
The study was conducted on a single farm, which may limit the generalizability of the findings.
Participant Demographics
914 Holstein Friesians calves and 60 dams were included in the study.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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