Cattle have 32 teeth total, with no upper incisors. Their dental formula is 0/4 incisors, 3/3 pre-molars, 3/3 molars. Calves are born with deciduous teeth that fall out as permanent teeth emerge. The first permanent incisor emerges at 1.5-2 years and the eruption process is complete by age 9 years. A cattle's age can be estimated by examining the wear of its lower incisors.