Animal and Dairy Science
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Due to cows’ universal exposure to manure, which contains E. coli and other gram-negative bacteria, as well as the requirement to maintain sec as low as possible, all cows should be vaccinated with one of the coliform vaccines available on the market. These vaccines have been proven to significantly reduce clinical coliform mastitis and have been shown to be profitable when incidence of clinical coliform mastitis exceeds 1% of milking cows.
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In the Southeastern U.S., beef cattle producers focus on forage management and maximizing the grazing season. To that end, Southeastern cattle spend the vast majority of their lives either grazing or consuming stored forage. Cereal grains and coproduct feeds are also commonly used nutritional supplements for cattle in times of elevated nutrient requirement. Any disease or disorder in the beef herd represents a nutrient drain and subsequent economic inefficiency. Sudden shifts in dietary composition as well as mineral imbalances are the primary causes for most nutritional and metabolic disorders. This publication contains an overview of the common nutritional and metabolic disorders that may affect beef herds in the Southeast along with management strategies that can be used to minimize the effects of these disorders in beef cattle production systems.
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Body condition scoring (BCS) is an easy and economical way to evaluate the body fat percentage of a cow. Cows can then be sorted and fed according to nutritional needs. Body condition scoring can be an effective tool for cattle producers who cannot weigh cattle, and it may be an even better measurement of cow condition and reproductive performance than weight. Most studies show that body condition decreases at a faster rate than weight loss. Therefore, body condition scoring can estimate the probability of re-breeding.
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Clean water for cattle is important for animal health and production and water delivery systems require routine maintenance and monitoring.
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Autumn and winter are busy seasons for beef cattle producers, and many times grazing and cattle management are not as tightly regulated as in other times of the year. Many Southeastern cattle operations include pastureland that encompasses or borders oak timbers; most North American oak trees are considered toxic. Therefore, when cattle venture into timber land in search of grazing, there is an increased chance that acorns will be consumed and toxicosis may occur. The purpose of this bulletin is to educate producers on the symptoms and prevention of acorn toxicosis in beef cattle.
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When it comes to managing a dairy herd, infections and inflammation of the cow’s uterus can have negative implications for animal welfare, milk production, and rebreeding capacity. Maintaining uterine health is essential for proper ovarian function and the creation of a uterine environment that is favorable for successful pregnancy. Although all production species can suffer from disruptions to uterine health after parturition, the prevalence of endometritis is notably greater in dairy breeds when compared to other breeds of cattle. Producers should be willing and able to assess uterine health through reproductive records and visual observations (with or without additional tools), and work with their veterinarian for identification and treatment of subclinical cases of endometritis if an issue is apparent. This bulletin provides information on how to minimize the risk of endometritis.
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Cotton byproducts offer a variety of feed ingredients that can lower the cost of beef cattle production. Cottonseed meal and whole cottonseed can be used in rations for any class of cattle. Gin trash and cottonseed hulls are low-energy feedstuffs that are used as a roughage source in high energy diets or as a partial energy replacement in mature cow diets. Cotton stalk residue can maintain a dry pregnant cow and will provide enough grazing for approximately 1 month if left standing or for three weeks if mowed prior to grazing. A reduction in fertility should not be a concern when recommended feeding rates are followed.
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Some of the most widely adopted precision agriculture technologies include guidance systems that utilize a Global Positioning System (GPS). Although these technologies are most commonly utilized in row-crop agricultural systems, they also have many potential benefits in forage-based production systems. With so many different options to choose from, it can be a daunting task to determine which technologies are the best fit for a specific farming application and budget. When coupled with a differential GPS system (which are available in various levels of correction accuracy), the accuracy of these guidance systems can be greatly improved. The main goal of this bulletin is to cover the currently available GPS guidance options for forage production systems.
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Pregnancy diagnosis is an important part of reproductive management in productive beef cow-calf operations. Open cows decrease profitability as they utilize similar resources as pregnant cows without producing a marketable calf to justify these costs. With the move toward more efficient operations and inclusion of artificial insemination (AI) and other reproductive technologies in cattle production, abstaining from pregnancy diagnosis may no longer be economically viable or practical. Establishing a pregnancy diagnosis program allows for the detection of cows that are not pregnant and allows producers to make management decisions to increase reproductive efficiency, such as culling of infertile females or resynchronizing females that are open. Although the economic benefits of incorporating pregnancy diagnosis are clear, the rate of adoption by beef cow-calf operations is considerably low in the United States. This article provides an overview of the different methods available (rectal palpation, transrectal ultrasound, and blood tests) for pregnancy diagnosis and provides a practical description of how to implement these methods.
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