Calving records collected between 2000 and 2008 at the Gudmundsen Sandhills Laboratory, Whitman, NE, were used to determine the effect of estrous synchronization on calving distribution and the impact of time of calving on carcass characteristics. Calves born between 2000 and 2006 resulted from non-synchronized 60 d breeding seasons between 1999 and 2005 (n = 2075). Calves born in 2007 and 2008...

The main objective of this study was to describe Holstein neonatal growth and development as influenced by dietary zinc supplementation and the CD18 genotype, both of which may affect immune competence. Holstein calves (n = 421), after being fed colostrum, were brought to a calf facility, randomly assigned to one of four zinc supplementation groups (control at 40 mg Zn/kg DM or the control diet...

ABSTRACT: The study compared the economic results between five groups of Holstein steers with different arrival body weights (ABW) but similar ages in feedlot. average ABW were 105, 112, 117, 123 and 129 kg (30, 90, 87, 60, 30 calves, respectively) an age 113 ± 1d. calves randomly distributed using unbalanced design. weighed upon at feedlot subsequently on days 224, 361 study. fed a steam- flak...

The objective of this study was to investigate the effect of transportation and commingling on measures of the acute-phase protein response in newly weaned beef calves. Thirty-two (Exp. 1; average BW = 266 +/- 20.8 kg) and thirty-six (Exp. 2; average BW = 222 +/- 34.6 kg) Brahman-crossbred calves were randomly allotted to one of four treatments (2 x 2 factorial arrangement [transportation x com...

Aim of the study: The effects forage source (alfalfa hay; AH vs. wheat straw; WS) with rumen undegradable to degradable protein ratio [low (LR) = 28:72; high (HR) 36:64] were evaluated in young dairy calves.Area Arak, Iran.Material and methods: Forty-eight 3-d old female Holstein calves (44.5 kg BW) allocated four treatments: (1) low dietary RUP:RDP (AH-LR); (2) (AH-HR); (3) WS (WS-LR); (4) (WS...

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 ...

The concentration of CLA in adipose tissue can be increased in ruminants by feeding pasture and extruded soybeans. The objective of this study was to evaluate maternal supplementation of raw (RS) or extruded (ES) soybeans on the concentrations of CLA in milk fat of cows and s.c. adipose tissue of suckling calves. Thirty-two spring-calving cows (BW 624 +/- 76 kg; BCS 3.5 +/- 0.4; mean +/- SD) an...

Abstract The period of heifer development is a relatively small fraction cow’s life; however, her pattern growth may have permanent effects on productivity as cow. We hypothesized that altering the during peri-pubertal would increase life-time across genetic types Bos taurus cows. objective was to determine stayability, calf production, and weight weaned six crops. Heifers (n = 685) were placed...

The objective of this experiment was to investigate the therapeutic efficacy of a supplemental bovine serum protein blend fed to calves challenged with virulent coronavirus. Twelve Holstein bull calves (approximately 3 wk of age) were allocated by initial body weight to Control (n = 5) and treated (n = 7) groups. On d 0, all calves were orally challenged with 1 x 10(7) plaque-forming units of v...

1. Tylosin is a macrolide antibiotic that is active mostly against Gram-positive bacteria and mycoplasmas. It is ineffective against Enterobacteriacea. It consists predominantly of tylosin A (factor A), but varying amounts of tylosin factor B (desmycosin), tylosin factor C (macrosin) and tylosin factor D (relomycin) may also be present, depending on the manufacturing source. Most of the microbi...