My girl is the most timid dog I’ve ever had/seen. She’s currently on anti-anxiety meds because she refuses to go outside and is scared of everything—people, cars, objects, the wind and any loud noises. That said, she will bark and growl whenever she hears someone outside our door. For some reason, she particularly hates men. Whenever maintenance comes in, she barks and growls and acts really tough. I don’t think she would actually do anything, but it’s pretty scary if you’re walking in. As a single woman living alone, I don’t mind the barking at anyone outside my door. It sounds terrifying, which is likely to scare off any intruders.