Failure of passive transfer of immunity (FPT) in dairy replacement calves has been linked to increased neonatal morbidity and mortality and long-term decreases in productivity. The purpose of this study was to estimate the prevalence of FPT in US dairy heifer calves in 2007 and to use nationally representative data to investigate associations of FPT with colostrum and calf management practices....

Raising dairy heifers from birth to calving has been found to comprise the second largest expense on the dairy farm towards the production of milk (Heinrichs, 1993) and therefore require a reasonably high level of attention on a commercial dairy farm. The focus of this paper will be feedstuffs, in particular limiting forages for the development of the rumen in the neonate, as well as a possible...

We assessed effects of two-step debonding strategies in calf rearing systems with different types prolonged cow-calf contact (CCC) on stress responses, health and performance dairy cows calves. Forty-eight Holstein Friesian pairs had either: 1) full including suckling, where was reduced before weaning via fence-line separation at day 49 (FC-FS) (n = 10); 2) contact, 56 by fitting calves a nose-...

stillbirth is defined as a calf death just prior to, during, or within 24 to 48 h of parturition. the exact cause of calf death in dairy cows in this period of time is unknown. the objective of this study was to investigate about the effective factors on stillbirth and also to estimate some of the genetic parameters in iranian dairy holsteins. data in the first and second lactation that have be...

The aims of this study were to estimate mortality rates in Norwegian dairy calves and young stock up to 1 yr of age, identify risk factors for calf mortality, and evaluate the etiology of calf mortality based on postmortem analyses. The material comprised 3 data sets. The first data set included information on 289,038 offspring in 14,474 dairy herds registered in the Norwegian Dairy Herd Record...

Calf diarrhea is a commonly reported disease in young animals, and still a major cause of productivity and economic loss to cattle producers worldwide. In the report of the 2007 National Animal Health Monitoring System for U.S. dairy, half of the deaths among unweaned calves was attributed to diarrhea. Multiple pathogens are known or postulated to cause or contribute to calf diarrhea developmen...

The prediction of the control of nutrient partitioning, particularly energy, is a major issue in modelling dairy cattle performance. The proportions of energy channelled to physiological functions (growth, maintenance, gestation and lactation) change as the animal ages and reproduces, and according to its genotype and nutritional environment. This is the first of two papers describing a teleono...

A total number of 1243 records of calving cases of 585 dairy Friesian cows during 8 consecutive years from 1997 to 2004 collected from Sakha Animal Production Research Station belonging to Animal Production Research Institute, Agriculture Research Center were used to study the effect of sire, live body weight (LBW) and age of dam and calving season on twinning rate and its consequent effects on...

Abstract In this research communication we describe the performance of dairy cow−calf pairs in two cow-driven CCC-systems differing cows' access to calves through computer-controlled gates (smart gates, SG). We investigated machine milk yield automatic milking system (AMS), calf growth, and intake supplemental concentrate. Two groups each with four cow-calf were housed a cow area, creep meeting...