Ciera does the same thing!! When I mop and sweep the floor I have to put her in her pen or gate her out of the kitchen, otherwise she is barking and biting at the mop or broom. Now the vaccum, I think she is a little afraid of it. She will bark and growl at it and run, but if she is in her pen, she acts like she would just tear it up if she could get ahold of it!! LOL