my african grey has changed dramatically

Question
QUESTION: hi i bought my african grey parrot snowflake about 5 yrs ago from a pet shop, she was in a tiny cage, and although she had come from the wild after months of screaming and attaching herself to the side of her cage we steadily made progress, she stopped screaming and eventually ate from my hand, started talking, and only allowed me to touch or go near her, she has a balanced diet, she started lowering her wings and crying like and regurgetating food for me, but over the past few months she has started turning towards my partner and now violently attacks me biting me at every chance, to the extent i am now physically scared tio go near or touch even her cage and now she has started to pluck, i do not understand wot i am now doin wrong cud u plz help us

ANSWER: How much out of cage time does she have?  

Is she on a mostly pelleted diet?

Has she ever laid eggs?


---------- FOLLOW-UP ----------

QUESTION: snowflake i do not know if she is male or female to tell u the truth, but no to my knowledge she has never laid an egg she sits with her wings down and sort of cries if this helps, and her diet has always been african grey exotic parrot fruit mix if u wud like vme to change her diet at all plz advise how much change how oftens but since her attacks on me have started not as much out of her cage as she used to be, cud this have anything to do with the attention i give my grandson since he came along plz

Answer
These are remarkably intelligent birds. Among the smartest of ALL birds.  With intelligence like this comes a need to be challenged and interacted with quite a bit more than a typical pet.
 It's not at all unusual for a bird to become what's called "cage bound" when their out of cage time is decreased.  It can be a real problem, as you're seeing.

 This would also contribute to the self mutilation (plucking).  
Eating a mostly seed diet is also not healthy and can cause fatty liver disease.
  
 She's probably not acting this way because of your grandson as much as it's because she's just as afraid as you are.  
 She has to start coming out of the cage again.

There isn't enough room here to post all the tricks and methods of doing this so check my "bird page"

  www.4AnimalCare.org
and click on the bird tab. You'll find all the information you need to modify her behavior with minimal injury to yourself.  
 You have to be patient and you can't give up ok?