Suzi did not start being a real barker until older. She turned a yr old on Mar.3 It has been warm in Cali and everybody has had their windows open. My darling sometimes will start with a low growl than bark her head off, or really cut loose and have a deep alarming bark , running to the door, back and forth to the window, very upset, all of this at 2am. wakes my son and I each time, Suzi is such a good protector. we love her so much. A little dog, with such a huge bark. It is not her fault , it is all the noise , and she must tell us what is going on!