Weird, my 2 year old cockapoo started doing this in the morning! She usually follows me around while i'm getting ready for work, she has done so for the past 2 years, but now all of a sudden she growls the whole time i'm brushing my teeth. She's never had a problem with that before. I try to listen hard to see if maybe she hears something I dont (i'm sure she does) but the dogs in the neighborhood are still pretty quiet when I get up in the morning. My family works the night shift so I try to get her to be quiet by giving her a stern "No" but she tests me and continues to growl but not as loud.