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APNews -- (20 Dec 2018) What makes for a happy chicken? Researchers in Canada are trying to answer the question as chicken welfare becomes a bigger issue. But there’s disagreement about how to measure chicken welfare. (2:20) Subscribe for more Breaking News: http://smarturl.it/AssociatedPress Website: https://apnews.com Twitter: https://twitter.com/AP Facebook: https://facebook.com/APNews Google+: https://plus.google.com/115892241801867723374 Instagram: https://www.instagram.com/APNews/ ? You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/4d11a87a0358716c0deb628af792abf8