In the CON group, more Herbst corpuscles ( n = 11–26) were visible at the tips of the bottom beaks, and this number also showed an increasing trend with the increasing age; further, there were fewer Herbst corpuscles ( n = 0–4) than in the other three experimental groups.
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Effects of beak-treatment styles on beak morphology and production performance of layer chicks aged 0-8 weeks.
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