Some links:
http://www.dailymail.co.uk/…/Barking-mad-moment-fearless-gu…
http://www.express.co.uk/…/Fearless-Guard-Dog-Barks-Adult-P…
http://www.inquisitr.com/…/chained-canadian-guard-dog-take…/
http://www.elitereaders.com/guard-dog-vs-huge-polar-bear/
http://www.telegraph.co.uk/…/Dog-takes-on-polar-bear…-and…
http://www.el-balad.com/1255018
http://www.dailyrecord.co.uk/…/pictures-dog-takes-polar-bea…
http://www.newsyab.com/chained-canadian-guard-dog-assumes-…/
http://www.ltaaa.com/wtfy/14969.html