It's just the new (unknown) thing spook. I saw this video months ago and decided to get one for Jade. She chased it but would not touch it, barked and skittered away jumped back an forth then just ignored it unless I made it attack her. She would jump away and look at it then ignore again. So I gave it to the kid next door. Even the hardest BB will jump away from something like this.
The BB bark is so powerful I would pretty much know it from most any other dog. But I do have an ear for these things too. I can just about name a dog by his bark from blocks away, won quiet a few bets on this lost a few too.
