It's wonderful that you have taken on the responsibility of
giving Pee Wee a caring home.
I have a 49 years old Amazon I rescued 4 years ago. I am
lucky that he is a very sweet cuddly bunny. He is handicap
though so does take some special care.
First, do not give in to the screaming anymore. Only give a
treat when and only when she is quite. Our 3 amazons have
learned that the only time they get people food is dinnertime.
They each get a bowl of what even we are having for dinner.
They do get treats but never when screaming. Same thing
applies to being picked up, if the are yelling Ma, ma, I don't
come until they quit yelling, then I go give loving or at
least acknowledge them if I am busy.