I highly advise to NEVER let her on your shoulder. Please dont let your emotions override the fact that she is still a unpredictable non-domesticated animal. She can cause permanent, life altering damage to your face. My female ekkie is the same way. I honestly dont think they can help it. Nature made them to be pretty aggressive and territorial. In nature, its the female that is in charge of defending the nest and chicks against much larger birds such as cockatoos. Try to avoid situations that will lead to a bite if at all possible. I let my girl hang out with me but I dont pet her or touch her except for having her step up. I refuse to let her on my shoulder. When your ekkie trys to get on your shoulder, redirect her quickly off onto something else and then leave the room for at least 15 min. Over time she will learn not to try to get on your shoulder as she will figure out that every time she does, you end up leaving her alone. Discourage her from going into dark corners like kitchen cabinet drawers or under neath couches...etc. That will just trigger her territorial nature. Feed her a low sugar (low carbohydrate) diet and limit fats. Diet can go a long way to helping her behavior. I feed my girl chop in the morning (no fruit in the chop), topps pellets in the evening and nuts are only used in foraging toys and for training. Make sure she is getting 12-14 hours of very dark, very quiet sleep. (Having her in the living room at night while the family is watching tv wont cut it....it needs to be very dark and very quiet. You can have her sleep in a smaller sleeping cage in a different part of the house if necessary.) Also, do not cover her cage with anything at night. When you cover the cage, it can trigger hormonal behavior and she will resent you if you "dismantle her nest" every morning when you take the cover off. There is no reason to cover the cage if the room she is in is very dark and quiet. Start target training her and practice indoor flight training with her to strengthen your bond with her in a safe way. Hope this helps.