| Value | Category | Cases | |
|---|---|---|---|
| -97 | Don't know | 37 |
15.5%
|
| 1 | Provides insulation | 17 |
7.1%
|
| 2 | Acts as a cushion | 30 |
12.6%
|
| 3 | Can be substituted for feed | 72 |
30.1%
|
| 4 | Dilutes feces | 83 |
34.7%
|
| a | Not applicable | 0 | |
| b | Don't know | 0 | |
| c | Refused to respond | 0 |