According to the experts, some wild animal species can never become domestic. They said that no matter for how many generations these creatures be kept in captivity, they never lose the wild nature from their genetic map. Regardless of the loving care they could be treated during their entire lives, they can suddenly attack for no particular reason, just as a natural reaction from their wild origins.
I know some people just like that.
Sergio J. Fernandez, June 30, 2010.