Technical Papers

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Feed restriction before calving negatively affects fertility in dairy cattle

Source: Alberta Agriculture and Forestry Negative energy balance post-calving leads to fertility problems in dairy cows During the transition from late pregnancy to lactation, most dairy cows decrease the amount of feed they consume. At the same time, their energy requirements increase, leading to a period of negative energy balance which may hinder future fertility


Source: UBC Providing quality care for recumbent (‘downer’) cows is a crucial role for the modern dairy farmer. Cases of poor quality care can harm both the cow and the reputation of the dairy industry. Providing good care can be both time- and labour-intensive. Producers must choose between available treatments, how to relocate the cow

Antimicrobial Susceptibility Patterns of Environmental Streptococci Recovered from Bovine Milk Samples in the Maritime Provinces of Canada

Source: Frontiers in Veterinary Science Abstract Determination of antimicrobial susceptibility of bovine mastitis pathogens is important for guiding antimicrobial treatment decisions and for the detection of emerging resistance. Environmental streptococci are ubiquitous in the farm environment and are a frequent cause of mastitis in dairy cows. The aim of the study was to determine patterns

A new strategy to improve milk production in dairy cows by optimizing the inherent ability of mammary gland.

Source: Richard, F., Chouinard, Y. and Pothier, F., Département des sciences animales, Université Laval (Québec, QC).  A typical lactation curve can be described as increasing from initial yield at calving to maximum or peak yield, maintaining peak yield, and decreasing from peak yield to the end of lactation. Cows are persistent if they tend to maintain

Dairy cows value access to pasture as highly as fresh feed

Source: von Keyserlingk, M. A. G. et al. Dairy cows value access to pasture as highly as fresh feed. Sci. Rep. 7, 44953; doi: 10.1038/srep44953 (2017). Many dairy cows in the developed world are now housed exclusively indoors with fewer than 5% of the 10 million lactating cows in the United States having access to

Milk losses associated with somatic cell counts per breed, parity and stage of lactation in Canadian dairy cattle

Abstract The reduction in milk production caused by subclinical mastitis in dairy cattle was assessed through the regression of test day milk yield on log-transformed somatic cell counts (LnSCC). Data was obtained from Valacta, Quebec, and a total of 312,756 test day records from Ayrshire cows and 1,869,785 test day records from Holstein cows were

Dairy herd management booklet from Delaval

Dairy herd management The dictionary defines management as “the act or art of managing: the conducting or supervising of something (as a business)”. As we can see, this definition is relatively broad and applicable to most management situations. “Management is a comprehensive activity, involving the combination and co-ordination of human, physical and financial resources in

Monitoring Why Heifers Leave Your Herd

It is true… As an industry we ask Canadian dairy producers to collect A LOT of data on the animals in your herd. Our primary purpose for such data collection is to offer valuable reports and services to assist with herd management and increase your profitability. These services also include genetic and genomic evaluations for

Balancing Reproductive Performance and Lactation Yields

Canadian dairy producers have made great strides in the area of reproductive performance. Statistics such as pregnancy rate, average days in milk and calving interval are rhymed off much more easily by the herd manager of today than the one of the past.  For various reasons, improved herd management and reproductive performance translates to more

Prevalence of and risk factors for hock and knee injuries on dairy cows in tiestall housing in Canada

Abstract Leg injuries on dairy cows are a common and highly visible welfare concern on commercial dairy farms. With greater attention being placed on food animal welfare and limited research being conducted on tiestall farms, this study aimed to identify prevalence and risk factors for hock and knee injuries on dairy cows housed in tiestall

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