All animals treated as part of a group (processing
or mass medicated) will be group or lot identified,
and the treatment information recorded.
Identification may be as group or pen, name or lot
number, or individual animal identification if available.
Reference should be made in the record to the
animal lot or group identification, product used,
serial/lot number of the product, date treated, dose
and withdrawal information assigned to the entire
pen. Recording animals under this system assumes
that every animal in the lot or group received
the treatment. All animals treated
individually shall be recorded individually, except
those mentioned in the next paragraph.