Table 2. Scoring procedure for behaviors observed.

Score	Observation
0	Repetitive abnormal behaviors or affiliative behaviors were not observed.
1	Repetitive abnormal behaviors or affiliative behaviors were moderately observed (two times or more / min)
2	Repetitive abnormal behaviors or affiliative behaviors were frequently observed (five times or 20 s / min or more). After observation, the behavior disappeared if the observer approached the cage closely.
3	Repetitive abnormal behaviors or affiliative behaviors were frequently observed (five times or 20 s / min or more). After observation, the behavior continued even if the observer approached the cage closely.