Calves up to 5-6 months only have incisors and premolars. The central pair of incisors is called a hook, followed by internal secondary tools, outdoor tools and medium selvages. On the upper jaw incisors do not – they replaced the horn plate. Premolars and molars, and then – three pairs on each jaw. Calf born with four pairs of incisors. Better developed hooks and internal medium.
Selvages and external medium cutters can only seem to be. If the incisors do not penetrate, hence, the calf was born underdeveloped. By 2 weeks cutters must withdraw completely. At the same age start to appear premolars, which are finally cut through to 3 weeks. With a half months already can be seen blurring incisors. Later all, it can be seen on the selvages (3 months).
In 5-6-month old calves cut with the first pair of molars, which grows to a finite size to 9 months. By 15 months erased dairy hooks, which are replaced in 15-18 months constant. At the same time, a second pair of molars. By two years of the animal 2 pairs of molars should be fully formed, and the third begins to erupt. Internal and external medium cutters and selvages are replaced constant in the age of 2,5, 3 and 4 years respectively. By 3 years of grow first and second pair of permanent premolars, to 3,5-4 years, third.