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: / bbcearth
BBC Earth Facebook / bbcearth (exUK only)
BBC Earth Twitter / 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/co...