Why Do Dogs Bark? | Secret Life of Dogs | BBC Earth

All dogs can trace their ancestry back to the wolf. But wolves howl and dogs bark. Scientists think the bark may have developed for human benefit but can dog owners tell what their dog's barks mean? Subscribe to BBC Earth: http://bit.ly/BBCEarthSubBBC Earth YouTube Channel: http://www.youtube.com/BBCEarth BBC Earth Facebook http://www.facebook.com/bbcearth (ex-UK only) BBC Earth Twitter http://www.twitter.com/bbcearth Visit http://www.bbcearth.com for all the latest animal news and wildlife videos This is a commercial channel from BBC Studios. Service & Feedback https://www.bbcstudios.com/contact/contact-us/