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Early Life Nutrition and its Effects on the Developing Heifer: Growth, nutritive intakes, and metabolism.
J Dairy Sci
January 2025
Agriculture Victoria, Ellinbank, VIC 3821, Australia; Centre for Agricultural Innovation, The University of Melbourne, VIC 3010, Australia.
We aimed to assess the effects of preweaning nutrition and postweaning growth rates on the metabolic characteristics of replacement dairy heifers until 20 mo of age. At birth heifers, were allocated to one of 4 treatment groups which were a combination of preweaning (high or low preweaning nutritional treatment), and postweaning treatments (high or low postweaning growth rate). In the preweaning phase (birth until weaning at 10 weeks of age) heifers were subject to either a High (8 L/day) or Low (4 L/day) milk feeding strategy, then at weaning either a high or low postweaning growth rate.
View Article and Find Full Text PDFEffects of Oregano Essential Oil and/or Yeast Cultures on the Rumen Microbiota of Crossbred Simmental Calves.
Animals (Basel)
December 2024
College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
This study hypothesized that combining oregano essential oil () and yeast cultures (s) would modulate rumen microbiota to promote gastrointestinal homeostasis and function. Twenty-four newborn, healthy, disease-free, crossbred Simmental male calves (birth weight ≥ 35 kg) were assigned to one of four treatments based on birth data. Treatments were as follows: (1) Control (), calves fed calf starter without additives; (2) , calves fed calf starter containing 60 mg/kg body weight () of OEO per day; (3) s, calves fed calf starter containing 45 mg/kg BW of YC per day; and (4) , calves fed calf starter with OEO (60 mg/kg, BW) and YC (45 mg/kg, BW) combination.
View Article and Find Full Text PDFAnalysis of Growth Models in Galician × Nelore Crossbred Cattle in the First Year of Life.
Animals (Basel)
December 2024
CISAS-Center for Research in Agrifood Systems and Sustainability, Instituto Politécnico de Viana do Castelo, Rua da Escola Industrial e Comercial Nun'Alvares 34, 4900-347 Viana do Castelo, Portugal.
The veal niche market is gaining momentum in Brazil. Locally known as 'Vitelão', veal refers to the meat from calves slaughtered up to 12 months of age. In this study, we assessed the Galician Blond × Nelore cross as a candidate to produce veal.
View Article and Find Full Text PDFProgression of the faecal microbiome in preweaning dairy calves that develop cryptosporidiosis.
Anim Microbiome
January 2025
School of Pharmacy and Life Sciences, Robert Gordon University, Garthdee Road, Aberdeen, AB10 7GJ, UK.
Background: Cryptosporidiosis is a diarrheal disease that commonly affects calves under 6 weeks old. The causative agent, Cryptosporidium parvum, has been associated with the abundance of specific taxa in the faecal microbiome during active infection. However, the long-term impact of these microbiome shifts, and potential effects on calf growth and health have not yet been explored in depth.
View Article and Find Full Text PDFEffects of maternal Cu, Mn, and Zn supplementation from different sources on physiological and productive responses of cows and their offspring.
J Anim Sci
January 2025
Selko USA, Indianapolis, IN 46231, USA.
Seventy-two non-lactating, pregnant Angus cows (initial body weight (BW) = 637 ± 13 kg; body condition score (BCS) = 5.5 ± 0.07 yr; and age = 6.
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