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Short- and Long-Term Production Losses and Repeatability of Clinical Mastitis in Dairy Cattle
clinical mastitis production repeatability
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2008/8/6
Between 1985 and 1990, a study of 5313 lactations of 2477 Black and White cows was carried out. A stepwise least squares method was used to obtain unbiased estimates of milk, fat, and protein losses t...
Strategies for Preventing Milk Fever in Dairy Cattle
milk fever hypocalcemia potassium cation-anion difference
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2008/7/30
Milk fever is a complex metabolic disorder that occurs at the onset of lactation. Clinical symptoms of this disease include inappetence, tetany, inhibition of urination and defecation, lateral recumbe...
Time of Ovulation Relative to Mounting Activity in Dairy Cattle
artificial insemination estrous behavior ovulation radiotelemetry
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2008/7/3
Time of ovulation was determined for Holstein cows (n = 51) for estruses occurring spontaneously (n = 33) or those induced by PGF2 (n = 86). Ultrasound examination of ovaries was conducted 42 to 49 d ...