Effects of feeding pregnant dams supplemental dietary fat during the last 55 d of gestation on cold tolerance of newborn crossbred calves with (Piedmontese cross, P, n = 15) or without (Hereford cross, H, n = 16) the muscle hypertrophy allele was determined. Primiparous F1 dams gestating F2 calves of the respective breeds were assigned randomly within breed to receive gestation diets containing...

After birth, a newborn calf has to adapt to an extrauterine life characterized by several physiological changes. In particular, maturation of the gastrointestinal tract in a new environment loaded with potential pathogens, which can predispose neonatal calves to develop diarrhea, and is a major cause of morbidity and mortality during the first 4 wks of life. We aimed to investigate the inflamma...

In beef cattle breeding, unlike dairy farming, the only product is a calf. Therefore, industry's competitiveness directly depends on annual retention from each cow and heifer calf, preservation of calves, high growth energy young animal throughout rearing period. These indicators are influenced by many factors, one which breeding technology. The colostrum period most critical; newborn calves th...

Diarrhea is a major cause of death in calves and this linked directly to economic loss the cattle industry. Fermented milk replacer (FMR) has been used widely clinical settings for calf feeding improve its health growth. However, protective efficacy FMR on diarrhea remains unclear. In study, we verified preventive effects using an experimental infection model bovine rotavirus (BRV) newborn fiel...

Growth and health in newborn dairy calves are highly related, and can be impaired by several stressors such as transportation, colostrum deprivation, and poor maternal nutrition. However, these stressors can be mitigated by good management and adequate early nutrition. Quality of management may vary among dairies but adequate early nutrition might be able to be more consistently controlled. A c...

One of the important routes Mycobacterium avium subsp. paratuberculosis (MAP) transmission in dairy calves is milk. The aim present study was to assess efficacy milk treatments prevent MAP infection calves. A one-year longitudinal carried out. Newborn were assigned one four experimental groups: 5 received naturally MAP-contaminated milk, copper treated 4 fed calf replacer, and 3 UHT pasteurized...

Main results:  In general the colostrum quality (112 g/l I dairy herds of mixed breed is high (50 g colostrum). Older parity cows, cows that smaller quantity of colostrum and cows tha with higher IgG concentration. Reducing colostrum is the most practical means by w  Calves fed 8.5% of birth bodyweight in concentration of IgG in serum in the first 3 Feeding calves transition milk subsequent a...

The upper respiratory tract (URT) hosts a complex microbial community of commensal microorganisms and potential pathogens. Analyzing the composition and nature of the healthy URT microbiota and how it changes over time will contribute to a better understanding of the pathogenesis of pneumonia and otitis. A longitudinal study was conducted including 174 Holstein calves that were divided in four ...

This study evaluated the effects of incremental tributyrin supplementation in pasteurized waste milk on growth performance, health, and blood metabolism dairy calves before after weaning. Forty-eight newborn female Holstein (39.6 ± 2.75 kg; mean standard deviation) were blocked by age randomly assigned to 3 treatments: (1) without supplementation, (2) with 1 g/L products (unprotected solid powd...

The intestinal microbiota of newborn calves changes during the early postnatal period and influences their health and immune function. We studied the compositional changes in the intestinal microbiome of newborn calves during the first week after birth by metagenomic analysis. In feces from newborn calves, we identified 4 bacterial phyla, namely, Actinobacteria, Bacteroidetes, Firmicutes and Pr...