Histological features of vomeronasal glands in Korean native cattle. (A, B) Vomeronasal glands stained with periodic acid–Schiff (PAS) in neonates (A) and adults (B). (C, D) Vomeronasal glands stained with Alcian blue (pH 2.5) in neonates (C) and adults (D). Scale bars = 25 μm.