And in this case it's doubly wrong, because untrained LGDs chase and kill chickens too. I've seen too many threads about people raising LGD puppies and having trouble with that. And I personally knew someone who got a very sweet adult Great Pyrenees-- that turned out to be quite a chicken killer, and was eventually rehomed to a chicken-free home.
And that's why I said even an untrained LGD will kill a chicken if given the chance