Birds are funny that way. Nerd grew to love me and would bite when scared or hurt, Lurch was just plain aggressive, scared, and mad at the world. He would bite with no warning just because he had a thought, probably just like secret. He did decide he liked me and trusted me after enough time and was slower and gave more warnings first. Dobby it seems is so socialized he just gives the strut and tail flare hoping it will work. I can see he's mad but so far worst he's given is ferocious beakings and a very hard pinch when I knew I shouldn't have touched him. They all were Maxis and each one had his own personality and way of dealing with things. Dobby is doing great and it's nice not to have to expect a sudden bite because I broke a rule or he wanted something and doesn't know how to ask nicely.