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Heterophil and Lymphocyte ratio in Drakes (A) and Hens (B). Both cortisol and corticosterone showed a significant increase in hen HLR at all time points during the experiment compared to controls. In drakes, only cortisol elicited a significant increase in HLR and only 1 day following onset of treatment compared to controls and corticosterone treatment groups. * = p < 0.05, *** = p < 0.001.
