It’s like French Bulldog Percy has three different personalities and three different ways of behaving. Percy the territorial and protective barker, Percy the dog worried by other dogs when on lead and Percy the friendly pet.
My clients had gone to the rescue for a Staffie type dog and came home with the tiny Chihuahua Yorkie mix (the photo makes her look larger than she is). She was cowering in the corner behind her bed, shaking. They just couldn’t leave her there.
At the sight or sound of an animal on TV Ben whines and runs about. He paces and crouches. He will then get into more of a frenzy and lunge and bark at the TV. I saw this for myself.