Many have one desirable trait but lack others, such as berry size or productivity.

This trait has led to their dependence and interest in humans, as it affects their hunting ability, a desirable trait for many owners.

Ambling was a desirable trait in a palfrey, as the smooth gait allowed the rider to cover long distances quickly in relative comfort.

The least desirable traits include big egos, confrontational personalities and shallow comprehension.

Selection of socially desirable traits such as intelligence and good looks could follow.