Destructive behavior or molting??

[Rainbow Parrot]

Hi, I've had my GCC for nearly two years. She's been molting for a few weeks and she's had pin feathers around her head/neck and has grown in a few new wing and tail feathers. That's all been ok but I'm concerned about her back.
She does have a handful of noticeable new feathers starting to grow but she's been chewing the other feathers a lot. Will these tattered feathers be falling out soon or should I consult an avian vet?? Any advice is appreciated View attachment 48664View attachment 48665View attachment 48666

 

[Owlet]

destructive behavior / barbering. this isn't normal wear and tear. I would contact a vet about getting some lab work done.