Six Holstein calves were evaluated for progressive exophthalmos. The affected calves were receiving daily injections of dexamethasone (30 microg/kg subcutaneously twice daily) as part of a metabolic study. The control calves did not exhibit exophthalmos. The ocular examinations were normal except for the exophthalmos, which ranged from mild to marked in severity. Upon postmortem examination, marked deposition of retrobulbar adipose tissue was noted in the affected calves. Dexamethasone administration appears to increase deposition of retrobulbar adipose tissue resulting in a progressive exophthalmos.
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http://dx.doi.org/10.1046/j.1463-5224.2003.00287.x | DOI Listing |
Vet Immunol Immunopathol
January 2025
Group for Reproduction in Animals, Vaccinology & Infectious Diseases (GRAVID™), College of Veterinary Medicine, University of Georgia, Athens, GA 30602-2771, United States.
Animals (Basel)
January 2025
Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
Telomere length (TL) has gained attention as a biomarker for longevity and productivity in dairy cattle. This study explored the association between neonatal TL in Holstein calves and lifetime parameters (lifespan, milk production, and reproduction). Blood samples were collected from 210 calves (≤10d old) across four dairy farms in Flanders, Belgium.
View Article and Find Full Text PDFJ Dairy Sci
January 2025
ICREA (Institució de Recerca i Estudis Avançats), 08010 Barcelona, Spain; Department of Animal and Veterinary Sciences, Universitat de Lleida, 25198 Lleida, Spain.
Sustainable alternatives to high environmental input feed ingredients are important to reducing the environmental impact of animal agriculture. Protein and oil extracted from cultivation of black soldier fly (Hermetia illucens) larvae (BSFL) on waste feedstocks such as manure, food waste and plant residues could be a suitable source of nutrients. The oil from BFSL contains large amounts of saturated fatty acids, particularly lauric acid, and may be a more sustainable alternative to palm and coconut oils that are currently used in calf milk replacers in many parts of the world.
View Article and Find Full Text PDFJ Dairy Sci
January 2025
EthoLab - Applied Ethology and Animal Welfare Lab, Graduate Program in Animal Science, School of Medicine and Life Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, 80215-901, Brazil. Electronic address:
Pair housing presents an alternative to individual or larger group housing systems, though the effects of different pairing ages on calf welfare are not well understood. In this study, we examined the impact of pairing age on the performance, health, and behavior of dairy calves. A total of 140 Holstein female calves (n = 70 pairs) were used, paired at 3 ages: Early (6-7 d; 48 calves), Intermediate (29-30 d; 48 calves), and Late pairing (49-50 d; 44 calves).
View Article and Find Full Text PDFJ Dairy Sci
January 2025
Department of Animal Science, Penn State University, University Park, PA, USA. Electronic address:
This observational study evaluated the relationship between lung consolidation observed at weaning and calf ADG, and the association of pathogen shedding at weaning on ADG in beef × dairy calves up to 238 d. Beef × Holstein calves (n = 143) were sourced from 2 dairies. Calves were managed in 3 cohorts and fed milk replacer and calf starter preweaning.
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