Adult cows have 8 incisors on the bottom front of the mouth and 6 molars on the top and bottom on each side of the mouth, for a total of 32 teeth. The top front of the cows mouth has a pad of skin and no teeth.
Calves have 20 deciduous teeth and no deciduous molars. The deciduous teeth of 75 percent of calves have all erupted at birth. The deciduous teeth of calves are replaced by permanent teeth as they grow. By 30 months of age, cows have lost all of their deciduous teeth and have their permanent teeth in place.