Table 1 Criteria for nest scoring
score | The degree that tissues were utilized |
|---|---|
0 | no tissue was touched, and no bite marks were present; |
1 | tissues scattered around without obvious signs of biting |
2 | tissues were piled up in one side of the cage without an obvious shape and biting |
3 | tissues were gathered in one side or corner of the cage, with a visible shallow and flat nest formed by slightly torn tissues |
4 | tissues were gathered in on one side or corner of the cage, with a visible nest formed by fragments of tissues |