qcPed: qcPed is a dataframe with 277 rows and 6 columns
In rmsharp/nprcmanager: Genetic Tools for Colony Management

id: character column of animal IDs
sire: the male parent of the animal indicated by the id column.
dam: the female parent of the animal indicated by the id column.
sex: sex of the animal indicated by the id column.
gen: generation number (integers beginning with 0 for the founder generation) of the animal indicated by the id column.
birth: birth date in Date format of the animal indicated by the id column.
exit: exit date in Date format of the animal indicated by the id column.
age: age in year (numeric) of the animal indicated by the id column.