Each grey is different and so you will need to try different methods to get the results you want. My Ana Grey is very territorial and although she is the smallest of my flock, she is the swiftest and most agile. She rules the roost. If she dive bombs someone, I talk to her and explain the wrongness of her action. She knows when she is being scolded. I guess it is the tone of my voice. If she continues, she is sent to another room by herself. Ahh the wonders of doors!!!! Of course there is a downfall, when she is bad I say "stop that" and if I do something she dislikes, I get the words right back in my face!!!! LOL!!!! Got to love those smart and mouthy greys!!!!