Trixie does that noise but not at us at her big sister Josie. Mainly she does it when she is tired or half asleep, or protecting a bone. I just pick her up and tell her no. She has never been aggressive towards me but she has went after Josie!! It was kind of scary! I tend to remove her when she starts making those taz noises. (it freaks people out that our visiting) and they look at us like we are nuts, but that is just how she is and she has gotten a little better with it. It helps to remove her from the situation.
