The poor baby! My little one I've had for 1 year and 3 months. He started chewing his tail feathers on 11 months. So I was very nervous and did a lot of research, the most common plucking/self mutiliation occurs from stress or boredom. Being in the new place with you im sure the plucking is going to continue for a bit. But that dienst' mean you cant do things to try and help him be distracted.
I also read that do not bring attention to the plucking, like don't move his head away from his body as he is doing it, I've read that cna make it worse. you want to try and bring all attnetion AWAY from the feathers. So like chewing toys. The thing that worked for my birb is that I got him TONS AND TONS of wicker straw toys and paper that he can take his frustration/boredum/stress out on instread of himself. Cause as we all know, our parrots are like little raptors in a tiny body. HAHA. I also got those wonder toys that encourage foraging:
https://www.amazon.com/Paradise-Toy...rd_wg=xuAfp&psc=1&refRID=A4AH93XPXDQWPS9DRTH7
https://www.amazon.com/Super-Bird-C...d=1528122378&sr=1-25&keywords=wicker+bird+toy
And just load up his cage with all these crazy toys and treats to keep his mind constantly stimulated. My birds prefers the wicker toys, rather than the wood. He's a runt conure, (pretty small for this type) so he has a hard time chewing at the wood and gets bored because he can't DESTROY it as well as the wicker. Try filling a water bottle with paper and treats and hang it upside down in the cage so he has to work to pull all the paper out to get to his favorite treats.
he just might need to more stimulated than he is. And sometimes putting a radio on when you leave the house also stimulates them, most birds love music and dancing to the music. Also, the non-silent room may be less stressful if they dont like being alone.
These are just a few things that have helped my bird not self-mutilate. they are like toddlers, and any bored toddler will find bad habits if they aren't entertained enough either.
I hope some of these help. And as I've said, all birbs are different, play around and see which works best for your new beautiful birb. But in my opinion, they can never have enough toys in their cage. Especially if you are out during the day for work and they are left along in their cage until you get home. oh! also, each time you clean his cage, move the toys all around. move the food around, the water, the toys, so it's like a whole new place for him to explore and discover.
Keep us posted
<3
**edit: There is a chance that he may even be OVER stimulated in the current house that he is in, sometimes if their cage is put in a place in the house that is stressful for them they can pluck as well. There are many many factors that lead to self-mutilation in birbs. I really hope that this was helpful in some way.
