Heat stress (HS) negatively affects various industries that rely on animal husbandry, particularly the dairy industry. A better understanding of metabolic responses in HS dairy cows is necessary to elucidate the physiological mechanisms of HS and offer a new perspective for future research. In this paper, we review the current knowledge of responses of body metabolism (lipid, carbohydrate, and ...

The dairy industry in North America has changed dramatically with a trend in direction of larger herds and higher production per cow, which seems to be associated with a decrease in fertility, especially a decrease in conception rates and extension of calving intervals (Butler, 2000; Lucy, 2001; Stevenson, 2001) This decline in fertility of lactating dairy cows is observed not only in North Ame...

Introduction Ionophores have been used extensively in the beef industry in Canada since 1977. Until recently, there has been no label indication for use of ionophores in lactating dairy cattle. Ionophores are feed additives that alter rumen microbial populations through ion transfer across cell membranes. In Canada, the label warning prohibiting the use of Rumensin premix in lactating dairy ca...

Over 30 dairy companies use the ADAS Milk Laboratory to provide them with individual farm bulk milk quality. The SCC information that this provides is representative of the industry and taken from a large range of dairy farms. Since 1994 (de-regulation) the ADAS Milk Laboratory results have shown a steady decline in SCC. From 2000 the SCC have unfortunately began to rise with an acceleration seen.

Cottonseed is a product of the cotton-fiber industry that is extensively used as an energy and protein source in dairy cattle diets. It provides a unique blend of protein, energy and fiber compared with other feedstuffs. Cottonseed is fed to dairy cows at 10 to 15% of the total diet dry matter (DM). Diets containing more than 15% cottonseed generally are high in fat and may contain undesirable ...

Milk proteolysis caused by Pseudomonas fluorescens is a serious problem in the dairy industries as a result of its ability to grow under refrigeration. The use of phages to control contaminants in food has been considered an alternative to traditional methods; therefore, a thorough understanding of such organisms is vital for their use. In this study, we show the complete genome sequence and an...

Finite mixture estimation (FME) is compared to estimated generalized least squares (EGLS) in the estimation of economies of size and production cost frontiers for Alabama dairy farms. FME provides several unique insights into the economic forces behind recent changes in Alabama’s dairy industry. FME provides estimation of a stochastic average cost frontier with known statisticalproperties, whic...