Abused chicks abuse as adult birds.

[JDPriestly]

I may seem obvious, but the evidence is finally in:

Chicks abused by older birds are more likely to grow up to become abusers themselves, scientists have found.

Researchers studying a colony of Nazca boobies, a colonial seabird, found the birds perpetuate a "cycle of violence".

Juvenile birds that are maltreated by older, non-relatives grow up to become more violent towards other chicks.

It is the first evidence from a wild animal that, as in humans, "child abuse" can be socially transmitted down the generations.

. . . .

http://www.bbc.co.uk/nature/14418174

We need a massive program to educate parents on non-violent communication and parenting.