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Behaviors of PC and N-PC during tonic immobility: (A) latency to first peep; (B) peep frequency; (C) latency to first head movement; (D) latency to rightening. #P = 0.057, ∗P < 0.05, ∗∗P < 0.005, ∗∗∗P < 0.001. Abbreviations: N-PC, non-processed chickens; PC, hatchery-processed chickens; TIb, baseline tonic immobility test; Tis, tonic immobility test after acute stress.
