My dog for the passed 2 days has been standing on his hind legs snapping at imaginary bugs. There is nothing there. I've looked. Not only in one room but in all the rooms in the house. My female just looks at him. She will be right beside him and he starts with this behavior. My dog does have a problem with anxiety. He screams like a banchie all the time. Hoping that there is someone out there that knows something. Please this is for real.