The vicious war of succession for the baboons of the Toronto Zoo is finally over

When zookeepers at the Toronto Zoo euthanized Betty, the zoo's 16-year-old baboon-troop matriarch, it touched off a vicious war of succession among the troops female members that saw them mutilating one another in savage combat -- the war was finally settled when zookeepers implanted the warring baboons with estrogen-releasing implants that reduced the viciousness of the fighting. (more…)