My U2 bites the snot out of me and I have had to deal with him alone (without hubby - who Puff chose to bond with). I used a very soft, thin baby blanket. He races after me, so I did like the Toro Bull Fight and when he got to the blanket I gently dropped it over him, this stopped him dead in his tracks, rendered him inable to see. Then I wrap him up (sort of swaddle like) turn him on his back, let his little toes grab my fingers and try to keep his little biting beak covered. I actually laid him on the counter the other night (he broke a wing feather - another story), all swaddled and slowly unearthed his wing. I was impressed with how well he behaves while wrapped up snug in a blanky. I have many many bites. Sometimes you just have to grit your teeth and take a few licks, just to make sure your bird is safe and healthy. It will help if you have someone to hold him or even a kitty crate for the vet trip. I recommend a crate or bird carrier vs. the holding, I usually crate, unless there is an emergency and they need protected from themselves.
Goodluck, hope Kiko can help you! You could fly me over, I would love to help!
Oh, for the plucking. This may piss her off, but try spritzing with aloe juice and filtered water. Daily. I am working with my B&G with plucking and mutilating feathers. I think her issue is jealousy and dry skin. So a little more attention and a daily misting. I spray the bottle over the head so it falls gently down on her. I will use up to an entire small bottle on one bird. They really need baths and love them ultimately. Always have fresh water for her as she may take baths in her water. Mine does this, so bird soup is not good for bird baths.
Give her lots of things to shred and tear up, even like copy paper and paper towels. Mine all love that palm shredder stuff. Also try singing gently to her. Do you know the sunshine song? Mine all calm down a bunch when I sing to them. My husband climbs the walls, but they love my rotten voice!
I wish you well!