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The effects of supplementation of a Saccharomyces cerevisiae fermentation product and reducing dietary starch content after calving on the immune response and nutrient digestibility in transition dairy cows
DownloadFall 2018
The transition period is a challenging time for dairy cows because they experience reduced immune system function, increased risk of sub-acute rumen acidosis, and inflammation. The combination of these can lead to increased susceptibility to disease and reduced productivity. Additionally,...
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The Effect of Risk for Subacute Ruminal Acidosis, Feeding Frequency, and Photoperiod on the Feeding Behaviour of Lactating Dairy Cows
DownloadFall 2016
Cows fed the same high-grain diet have a large variation in rumen pH and can be categorized as higher or lower risk for developing subacute ruminal acidosis (SARA). The objective of this research was to determine if differences in feeding behaviour existed between the two categories and if these...
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Evaluation of seed hardness and malting characteristics of barley grain for use in ruminant diets
DownloadSpring 2015
In Western Canada, over 70% of the barley grain grown for malt is sold as livestock feed. The main objective of this thesis was to investigate the relationship between ruminal dry matter digestibility (DMD) and seed hardness (SH) and malting characteristics (MC) of barley grain by measuring in...
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Fall 2012
Sub-acute ruminal acidosis is a digestive disorder experienced by animals fed a high grain diet, and causes substantial economic loss to the dairy industry. The objective of this research was to evaluate novel approaches to manage and prevent sub-acute ruminal acidosis. In Study 1, I found that...
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Effects of nutritional management on production performance and rumen fermentation in dairy cows during calving transition
DownloadSpring 2019
Dairy cows usually experience negative energy balance during the calving transition period (3 weeks before to 3 weeks after parturition) due to the rapid increase in nutrient demands for milk production. In order to compensate for the energy deficits, diets rich in highly fermentable...