Hi , of course I’m still at growling phase , but i read somewhere that if you are at the phase that your parrot wants to be with you but he bites you , when he does that juat leave the room quickly , and then try again and if he does again leave the room quickly again , that way , he will understand, that when he bites the only thing he gets is loneliness , so he won’t do it again . but note that the method , which I mentioned , is for parrots which they don’t growl or are not fully wild because if you do that with a wild parrot the result is exactly opposite, because he thinks : well I don’t want him be around me and whenever I bite him he leaves the room so it’s a good way to keep him away , and he keeps doing it.
I hope it helps you.