Does animals have emotions?

Living being have gone a process of natural selection for million of years, in which those with characteristics are the one that survives. So, is emotion vital for survival, apparently yes, specially with mammals and birds.

Mammal mothers let the young suckle on their body, the youngters in return feel a desire to bond and stay near them.

In the wild mammals that fail to bond with their mothers rarely survive for long. It is evident that love among mother -infant is required for all mammals.

In 1950s and 1960s, Harry Harlow conducted an experiment on infant monkeys separated from their mothers after birth. When given a choice between a metal dummy-mother fitted with milk bottles, and a soft cloth-covered dummy with no milk, the babby monkeys clung to the barren mother for all they ar...