Metabolic-digestive clinical disorders of lactating dairy cows were associated with alterations of rumination, physical activity, and lying behavior monitored by an ear-attached sensor

The objective of this observational cohort study was to characterize the pattern rumination time (RT), physical activity (PA), and lying (LT) monitored by an automated health monitoring system, based on ear-attached sensor, immediately before, during, after clinical diagnosis (CD) metabolic-digestive disorders. Sensor data were collected from 820 lactating Holstein cows daily calving up 21 DIM for detection disorders (HD). Cows grouped retrospectively in no-clinical disorder group (NCHD; n = 616) if no HD diagnosed, or (METB-DIG; 58) diagnosed with ketosis indigestion only. another within −7 +7 d CD displaced abomasum, ketosis, included plus one (METB-DIG+1; 25). Daily RT, PA, LT, absolute relative changes analyzed linear mixed models without repeated measures. Rumination PA smaller, LT greater METB-DIG METB-DIG+1 than NCHD most days HD. In general, differences larger between groups groups. cases, RT decreased a nadir increased peak before HD, return levels similar 7 CD. Absolute values 5 day different group. For had affected disorders, resolution signs group, but increase decrease observed signs. We conclude that dairy including presented substantial alterations captured sensor. Thus, systems sensors might be used as aid identifying Moreover, positive indicators recovery