||At birth to 1 month
||Two or more of the temporary incisor teeth present.
Within first month, entire 8 temporary incisors appear.
||As a long-yearling, the central pair of temporary
incisor teeth or pinchers is replaced by the permanent
pinchers. At 2 years, the central permanent incisors
attain full development.
|2 ½ years
||Permanent first intermediates, one on each side of
the pinchers, are cut. Usually these are fully
developed at 3 years.
|3 ½ years
||The second intermediates or laterals are cut. They
are on a level with the first intermediates and begin to
wear at 4 years.
|4 ½ years
||The corner teeth are replaced. At 5 years the
animal usually has the full complement of incisors with
the corners fully developed.
||The permanent pinchers are leveled, both pairs of
intermediates are partially leveled, and the corner
incisors show wear.
||At 7 or 8 years the pinchers show noticeable wear;
at 8 or 9 years the middle pairs show noticeable wear;
and at 10 years, the corner teeth show noticeable wear.
||After the animal passed the 6th year, the arch
gradually loses its rounded contour and becomes nearly
straight by the 12th year. In the meantime, the teeth
gradually become triangular in shape, distinctly
separated, and show progressive wearing to stubs. These
conditions become more marked with increasing age.
Illustrations for this table were prepared by R.F.
Johnson and published in The Stockman's Handbook
by Ensminger Second Edition page 539.