a friend of mine has a black lab dog which they purhased from a non working stock and have it as a pet, is a big strong type built like a brick shit house ,over weight but big boned type ,i has issues with men ,quad bikes , horses ,it even gets excited when other dogs arrive at him ,it has turned on its owner when trying to seperate a confrontation ,today when a horse walked passed it bit the owners dad who was walking it for them ,i ve mentioned having its balls off and getting it muzzled before it really does sink its teeth into something or someone ,the dog is very good in the house and wit