Effects of bed cleanliness on tucked and extended sleep-related lying postures of Japanese Black fattening cattle

  • Shen Dan (Graduate School of Agricultural Science, Tohoku University) ;
  • Hidetoshi Kakihara (Western Region Agricultural Research Center, National Agriculture and Food Research Organization) ;
  • Michiru Fukasawa (Graduate School of Agricultural Science, Tohoku University)
  • Received : 2023.04.12
  • Accepted : 2023.06.20
  • Published : 2023.11.01


Objective: Resting comfort may influence sleep-related lying postures in cattle. This study aimed to investigate the effects of bed cleanliness on tucked (TSP) and extended (ESP) head positions in sleep-related lying postures. Methods: The study was conducted over two experimental periods. In each period, four Japanese Black fattening cattle were assigned to the cleaning treatment (CL), in which bedding material was replaced once during each experimental period. Four cattle were assigned to the control treatment (CON) with no bed cleaning. Daily duration, bout frequency, and bout length of sleep-related lying postures were measured, and bed moisture, ammonia concentration in the air, plasma cortisol, and serotonin concentration were also measured within one week before and after cleaning treatment in each period. Results: The bed moisture and ammonia concentrations decreased in CL after bed cleaning. Following bed cleaning, the duration and bout frequency of TSP in CL decreased compared to that observed in CON, whereas ESP in CL increased after bed cleaning. Total duration of sleep-related lying postures and cortisol and serotonin levels did not differ between CL and CON. Conclusion: These results suggest that cattle in sleep-related lying postures shifted from tucked head positions to extended head positions in response to improved bed cleanliness.



This study was financially supported by a research grant from the Ito Foundation (


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