I have a female 12 week old giant schnauzer. I l love her so much and she is such a loving dog. She sits on my lap/lays against me when she’s tired, loves being around me and my fiancé and responds really well direction. However, she at times has a very aggressive side to her. Im not even taking about the biting of the hands/legs because that has improved since we got her 5 weeks ago and she focuses her attention on toys now. The thing that scares me the most is aggressive behavior in which she growls and lunges at us (including our face if we’re bent over). It typically comes from frustration when she’s not getting something that she wants. Im so worried this behavior will continue as she grows and the fact that her mother is on the large side (110 lbs) makes me worried she could be dangerous. For example, yesterday she locked her mouth around my arm (thankfully that was protected by a jacket) and would not let go, growling at me. I try to redirect her with a toy or ignore her when she does this. Is there anything else I can do? She’s such an amazing puppy otherwise I don’t understand why she’s doing this.