Recent research reveal that wolves did it themselves. Friendship with early humans who offered wolves food helped them survive.
22. Plothound 10 physical harm attacks (1982-2018) (less than 1 each year). Deaths 1982-2018: 0.
German settlers produced the Plott hound, North Carolina's official dog, to hunt bears in the mountains.
#21. Catahoula Body harm attacks: 10 (less than 1 per year) Deaths: 1 (1982-2018)
The Louisiana-bred Catahoula Leopard dog was first used by settlers to catch and manage wild hogs and cows.
#20: Australian shepherd Attacks causing physical harm (1982-2018): 14 (less than 1 per year). Deaths 1982-2018: 0.
Australian shepherds are among the smartest breeds and need daily mental stimulation and exercise.