A funny video has emerged of a dog fiercely barking at a piece of plastic stuck in a tree. <br /><br />In the footage, shot on February 28 in Blacksburg, VA, USA, Lex the dog trying to fend off a threat which isn't really one. <br /><br />"Upon closer inspection it turned out to be just some debris stuck in a tree, but she was very upset about it.," her owner wrote online.
