forty neonate calves were used in this study. the animals were divided into two treatment (n = 20) andcontrol (n = 20) groups. in the treatment group, oral iron as ferrous sulphate was supplemented to each calf atthe dose of 150 mg/day for 28 days, from the birthday. blood sampling was taken from jugular veinimmediately after birth and on days 7, 14, 21 and 28 after birth. significant differenc...

The purpose of this study was to investigate the effect of maternal inbreeding on incidence of twinning,dystocia and stillbirth in Holstein cows of Iran. Calving records from March 2000 to April 2009 comprisingof 365,021 calvings on 153,802 cows from 86 dairy herds were used. The mean level of inbreeding was0.7%, less than 37% of all animals were inbred, and a small proportion (3.45%) of inbree...

Professional heifer growers and dairy producers are faced with the challenge of raising healthy calves, while still paying close attention to rearing costs and profit. Factors that may be considered in selecting a liquid feeding program may include the number of calves fed, economics and cash flow, nutritional characteristics, calf performance targets, resource availability (e.g. consistent sup...

Improving health and welfare outcomes for replacement surplus dairy calves is important the sustainability of industry. Dairy farmers veterinarians hold expertise in calf management have valuable perspectives on how to practically motivate improvements. The objective this study was determine strategies that could improve care receive farms from perspective their herd veterinarians. Two veterina...

BACKGROUND The aim of this study was to detect the associations between bovine herpesvirus 1 (BHV-1) status of a herd and respiratory disease (BRD) occurrence and reproductive performance in pregnant heifers and cows. The association between management-related factors and higher BRD occurrence was also estimated. METHODS Serum samples, collected from cows and youngstock from 103 dairy cattle ...

Dairy heifer calves experience high levels of contagious disease during their preweaning period, which may result in poor welfare, reduced performance or mortality. We determined risk factors for a cohort study 492 heifers recruited from 11 commercial UK dairy farms. Every animal received weekly examination by veterinarian birth to nine weeks using the Wisconsin scoring system. Multivariable mo...

calving records from april 1998 to september 2006 comprising 104,572 calving events from 16 dairy herds of iran were used to analyze the potential effect of dystocia on calf stillbirth and productive traits in iranian holsteins. statistical analyses of production traits were performed using a linear mixed model procedure. also, a logistic regression model was constructed to analyze the effect o...

Abstract Research is needed on how technology can facilitate cow?calf contact (CCC). This research communication describes the behaviour of dairy pairs in two cow-driven CCC-systems differing cows' access to calves through computer-controlled gates (smart gates, SG). Specifically, cow traffic SG when visiting their calves, allogrooming, suckling and cross-suckling, eating resting finally vocal ...

There is an interest in alternative rearing systems that allow for prolonged cow-calf contact (CCC). Yet, a better understanding of cows’ affiliative behaviour those needed. We evaluated the effect type CCC on calf-directed dairy cows. Cows were permitted to have either: i) partial (PC) with their calf; calves housed pen adjacent cow area allowing limited physical initiative dam but no suckling...