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Abstract

The measurement of the respiration rate (RR) in cattle is a valuable tool for monitoring health status. Thus, an RR sensor can be essential for stress detection, especially heat stress. Heat stress leads to a deviation of the normal RR and results in a decrease of milk production and fertility....

Author(s)
Strutzke, S.; Fiske, D.; Hoffmann, G.; Ammon, C.; Heuwieser, W.; Amon, T.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 1, pp 690-695
Abstract

The objectives of this study were: (1) to describe the rumination and feeding behavior of freestall-housed Holstein dairy cows in the weeks around parturition, and (2) to determine the relationship between postpartum disease and precalving rumination and feeding behavior. Eighty cows were enrolled...

Author(s)
Schirmann, K.; Weary, D. M.; Heuwieser, W.; Chapinal, N.; Cerri, R. L. A.; Keyserlingk, M. A. G. von
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 12, pp 9917-9924
Abstract

In times of ongoing automatization of dairy cow husbandry, objective and reliable tools for mastitis diagnostic are highly in demand. The objective of this study was to investigate the diagnostic value of a handheld dynamometer and an infrared thermometer to diagnose and score clinical and...

Author(s)
Wollowski, L.; Bertulat, S.; Kossatz, A.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 7, pp 6532-6539
Abstract

The objectives were to (1) develop a standard operating procedure (SOP) for ultrasound-based measurements of teat canal dimensions and (2) determine the precision of ultrasound-based measurements of teat canal dimensions in dairy cows. Teat scans (n=64) of the right hind and left front teats from...

Author(s)
Wieland, M.; Melvin, J. M.; Virkler, P. D.; Nydam, D. V.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 2, pp 1518-1523
Abstract

Major advances in assisted reproductive technologies have improved reproductive efficiency in dairy cattle. However, these developments occurred regardless of the perception of consumers, who often distrust biotechnology in food production. Therefore, the objective of this study was to investigate...

Author(s)
Pieper, L.; Doherr, M. G.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 4, pp 3162-3170
Abstract

The use of point-of-care (POC) devices to measure blood metabolites, such as β-hydroxybutyrate (BHB), on farm have become an important diagnostic and screening tool in the modern dairy industry. The POC devices allow for immediate decision making and are often more economical than the use of...

Author(s)
Yepes, F. A. L.; Nydam, D. V.; Heuwieser, W.; Mann, S.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 7, pp 6455-6461
Abstract

The objective of this study was to investigate the impact of heat stress on the expression of estrus signs and follicular diameter at the day of estrus in dairy cows under farm conditions. Cows reported in estrus (i.e., by an automated activity monitoring system or by the herd manager) were...

Author(s)
Schüller, L. K.; Michaelis, I.; Heuwieser, W.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 102, pp 48-53
Abstract

Swelling of the mammary gland is an important sign to detect clinical mastitis (CM) in dairy cows. The overall objective of this study was to evaluate if udder firmness can be used as a cow-side indicator for mastitis and to evaluate how CM affects firmness within 14 d after diagnosis. A...

Author(s)
Rees, A.; Fischer-Tenhagen, C.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 3, pp 2170-2183
Abstract

Although taking body temperature by rectal thermometer is the method most commonly used to identify sick cows in the postpartum period, no data on the repeatability of this measure are available. The overall objective of this study was to evaluate variability of rectal temperatures in dairy cows...

Author(s)
Burfeind, O.; Keyserlingk, M. A. G. von; Weary, D. M.; Veira, D. M.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2010, 93, 2, pp 624-627
Abstract

Changes in feed intake are useful in early detection of disease in dairy cows. Cost and complexity limit our ability to monitor dry matter intake (DMI) of individual cows kept in loose-housing systems. A 5-point subjective scoring system has been developed to visually describe rumen fill, but no...

Author(s)
Burfeind, O.; Sepúlveda, P.; Keyserlingk, M. A. G. von; Weary, D. M.; Veira, D. M.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2010, 93, 8, pp 3635-3640

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