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Effect of metabolic and digestive disorders on patterns of behavioral, physiological, and performance parameters of lactating dairy cows.

M. M. Perez

Events

06-22-2020

Abstract:

70
Effect of metabolic and digestive disorders on patterns of behavioral, physiological, and performance parameters of lactating dairy cows.
M. M. Perez*1, E. M. Cabrera1, C. Rial1, D. V. Nydam2, J. O. Giordano1. 1Department of Animal Science, Cornell University Ithaca, NY, 2Department of Population Medicine and Diagnostic Sciences, Cornell University Ithaca, NY.

Our objective was to characterize the pattern of multiple behavioral, physiological, and performance parameters collected by sensors in Holstein cows diagnosed with displaced abomasum (DA), clinical ketosis (KET) and indigestion (IND). Sensor parameters included activity (ACT), resting (RET), rumination (RUM) and eating (EAT) behavior, reticulo-rumen temperature (TEMP), milk production (MILK), milk components (FAT; PROT = protein), milk conductivity (CON), and BW. Cows were clinically examined daily until 28 DIM. Sensor data from d −7 to 7 relative to clinical diagnosis was compared for cows with DA (DAO = 5) or KET and IND only (K-IO = 67), cows with DA or KET and IND plus another disorder during the 15 d period (DA+ = 40, K-I+ = 86), and cows with no clinical signs of disease (NCD n = 824). Data were analyzed by ANOVA with repeated measurements with group, time, and their interaction, and lactation (1, 2, 3+) as fixed effects. Cow within group was a random effect and the subject of repeated measures. Cows in DAO, DA+, K-IO and K-I+ had lesser (P < 0.01) RUM (d −7 to 7 for DA+ and K-I+, d −7 to −6 for DAO and K-IO), lesser (P < 0.01) EAT (d −7 to 7 for DA+, d −6 to 7 for DAO, d −4 to 7 for K-I+ and d −3 to 7 for K-IO), and lesser (P < 0.01) MILK (d −7 to 7 for DAO and DA+, d −7 to 7 for K-I+ and d −6 to 7 for K-IO) than cows in NCD. Compared with cows in NCD, DAO and DA+ had more (P < 0.01) RET from d −7 to 7 and d −4 to −1, respectively but then less (P < 0.01) RET from d 3 to 7. For cows in K-I+ and K-IO RET was less than for cows in NCD from d −4 to 2 and from d −3 to −1, respectively. FAT and FAT:PROT ratio was greater (P < 0.01) for K-IO and KI+ from d −2 to 7. Compared with cows in NCD, FAT and FAT:PROT was greater (P < 0.01) from d −6 to 7 for cows DA+ whereas for cows in DAO it was greater from d −1 to 7 . Cows in DA+ lost more BW than NCD cows from d −3 to −1. TEMP was less (P < 0.01) for cows DAO and DA+ than NCD from d −7 to d 0. We conclude that cows with metabolic and digestive disorders had specific patterns of change in behavioral, physiological and productive parameters monitored by sensors.

Keywords: sensor, disease, dairy cow.

Biography: TBD