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Experimental design; prebiotics treatment with or without heat stress of the chicken study groups.
| Factor | Groups | |||
|---|---|---|---|---|
| Control group (G1) | Heat stress group (G2) | Prebiotic group (G3) | Heat stress + prebiotic (G4) | |
| Prebiotics | Absent | Absent | Present | Present |
| Temperature degree | Ambient temperature (22 °C) | High temperature (32–35 °C) | Ambient temperature (22 °C) | High temperature (32–35 °C) |
