Table 2.
The significance of independent variables on outcomes.
| Independent variables | Models | |||
|---|---|---|---|---|
| Time spent | Dustbathing | Foraging | Pecking | |
| Bedding type | * | * | * | * |
| Substrate area | * | |||
| Enclosure area | * | |||
| Number of days birds were allowed access to tested substrates | ||||
| Stocking density | ||||
| Animals/m2/day | ||||
| Species (breed) | ||||
| Substrate depth | ||||
| Grain size | ||||
Green indicates a significant effect (P < 0.05), yellow indicates a tendency (0.05 ≤ P ≤ 0.1), and red indicates a non-significant effect (P > 0.1). Starred (*) variables were included in model equations.