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Histological structure of proventriculus at day 14 (A) and day 28 (B) of age of layer-type chicks exposed to fasting (control, T1) or early feeding on a layer starter diet (T2), a layer starter diet contained 3% molasses (T3), and a broiler starter diet (T4) during the first 72 h post-hatching. M, mucosa with longitudinal mucosal folds (black arrow); LM, lamina muscularis mucosae; PS, propria submucosa; SM, sub mucosa; G, submucosal gland. (H and E, ×40).
