How do Animals identify their off springs?

Many methods, not all fail-safe seem to be used by the animals in identifying their young. Some animals lick their babies at birth, anointing them with a chemical tag they can identify. Others rely on voice identification with the chicks learning to respond to parental calls. Still others rely on visual identification, with the babies responding to the first large moving object (usually the mother) they see and following it everywhere.

Many animals, especially the social ones, do not discriminate between babies in the herd.