
As i was visiting a breeder that has over 20 years of hand feeding parrots i saw something that only made sense at home when it hit me:
Tamness is passed on genetically.
In short: Breeder had over 50 ringnecks from 4 breeders. all handfed by 1 person.
All parent birds from all 4 breeders are not tame, caged breeding pairs that might have been or not handfed when young.
a group of 5 or so chicks stood out because they were flying uncontrolably into cage walls as if it was the end of days.
He said: "It was really difficult feeding these chicks, they were like rabbits".
these birds were acquired from 1 breeder that his stock never gets handraised and very little human interaction.
Although all the birds were handfed the same way by the same person all birds from this breeder we truly wild, at one point i was thinking; I hope they don't break their necks.
Some experiments done with other animals also suggest the same thing..
http://en.wikipedia.org/wiki/Domesticated_silver_fox