I've never heard them shouting before though, I guess this varies from handler to handler? I mean, you would need to get your voice heard and appear in charge, it's the same with horses, but I've never heard them shouting at Whipsnade (not that its likely that the elephants are offended by their harsh tone lol) . I've never seen them use the ankus excessively either, again I guess this is a different approach by different staff members.