In your original post.
You said Sierra intends to do damage and Sierra would give an armful of snarl and try to kill you. You did write that.
I don't know what you are reading but Sierra is not human aggressive at all. She loves people so the last thing she would try to do is snarl and try to kill you.
I'm just wondering why all your dogs were so different, and if there was any way to correct the aggression?
different genetics? different anxiety levels? different fears and level of fear?
My point in describing my dogs was in explaining my definition between reactivity and true aggression.
fuzzybunny, IME, is correct when she said " I think most dogs that have serious aggression issues don't get over it. It can improve with work and the owners learn how to manage it at best."
Banshee - was ok with most people until a traumatic experience when her brother was killed in an accident. If you were not known to her prior to it then you wouldn't be smart to walk into the house, especially if my son was home alone. She was especially on guard when her boy was home alone. She is great with kids and no worries there. It is adults. if she knew and liked you prior to this then you could come into the house without a problem.
Sierra - bad anxiety, runt of the litter, never separated so she could eat so had to fight for every scrap she had. We could tell that from the number of scabs and 4# at 9 weeks. Mother was aggressive. Go figure she would be dog aggressive, right? I'm sure we could work on it and it might improve to some degree but the washer going off balance will have her redirecting aggression at Jax.
Jax - Was very good with dogs until I fostered a doberman with HIGH anxiety way past my level of knowledge and never should have been left in my home for long term, especially when I told them at the beginning there were problems. He was a bundle of nerves, would feel crowded and tear into the nearest dog. So at 1 yr old, Jax learned to fear and she learned to fight. Jax has come a long way with her reactivity and is a work in progress.
Is there a way to correct aggression? Yes, in cases depending on the dog and the reason behind it. But not always. Management of the environment is key to any dog that has anxiety or aggression issues.