Table 1.

Details of measurement samplings.

Measurement Samplings	Details
Pecking behaviors	12 hens/cage, 4 cages/treatment, 48 hens/treatment, at 34 weeks
Open filed test	6 hens/cage, 4 cages /treatment, 24 hens/treatment, at 35 weeks
Tonic immobility test	12 hens/cage, 4 cages /treatment, 48 hens/treatment, at 36 weeks
Avoidance distance test	12 hens/cage, 4 cages /treatment, 48 hens/treatment, at 36 weeks
Nobel object test	4 cages/treatment, at 36 weeks
Plumage condition	12 hens/cage, 4 cages /treatment, 48 hens/treatment, at 36 weeks
Blood parameters	6 hens/cage, 4 cages/treatment, 24 hens/treatment, at 56 weeks
Dead birds	9 cages/treatment, during the experiment
Cannibalistic injuries	12 hens/cage, 4 cages/treatment, 48 hens/treatment, during the experiment