I absolutely will not relax yet! I didn't even go to bed last night. Poppet continued to pluck the poor guy. This morning at 5 am I moved Poppet out of the cage. She freaked out at being separated from Phoenix and was pacing and chirping frantically, Arthur freaked out at being separated from her and screamed as loud as he could frantically, Phoenix freaked out at being alone and hungry and cried for food as loud as he could, and I freaked out at the idea of having to hand raise Phoenix if Arthur didn't get his feathery butt to the nest box and feed him.
Then, my breeder contact took a look at how Phoenix had been plucked and she said she thought Poppet was doing it because she needs sodium since she's getting ready to lay eggs again soon and blood is salty. She plucked little feathers on his head, and chewed a few bigger feathers on his body but didn't rip them out. And she didn't bite him at all. She said to put Poppet back in the nest and we'll try to get some sodium into her another way so she'll stop plucking him.
However, once I got Poppet back in there, they were too shaken up from the whole ordeal to feed Phoenix. I had to step in and handfed him 2 CCs of formula. He's been getting meds 4 times a day from a syringe from me, but does not yet connect syringe with food. So I got a bit of formula into him and when he was screaming for food good and loud, I put him back in the nest box (which Arthur and Poppet had gone into in my absence) and they fed him within 15 seconds. Phew!
Then I went and got a 4 hour nap since I hadn't slept yet. Came back downstairs to find an almost empty cropped and alone Phoenix. Thought I was going to have to feed him again, but apparently the parents were waiting until I came downstairs to feed him because they BOTH fed him within about 30 seconds. They're now eating more food and hopefully baby Phoenix is sleeping. I'm a little worried about him getting cold since he's by himself so much, but he's getting bigger and his pinfeathers keep him warm some, and I have a heating pad set to low on the side of the nest box.
Hopefully when we get some sodium into Poppet, that will stop her from plucking him. If it doesn't but the plucking is not severe or aggressive, my breeder contact actually suggests leaving him with mom and dad. If we DO have to remove him, he will figure out the handfeeding thing quickly and hand raising him should be way less stressful than hand raising his siblings was since he's healthy and needs food 4-5 times a day versus every 2 hours around the clock.
The next hurdle after the sodium issue is that my friend from out of town is arriving Tuesday and will be sleeping on our couch 3 feet from the bird cage for the next 3 weeks. Hopefully the parents will not feel threatened by her presence and abandon him. Then the NEXT hurdle is that I will be out of town for 5 days and Paul is going to have to take care of everyone. I am the usual bird caretaker so hopefully they will not abandon him when Paul ends up taking care of them.
My plan to get them used to Paul is to have him change the papers and water until I leave and have him look in the nest box and stuff, and I'll give Phoenix some supplemental hand feedings so he gets used to it and so Paul can learn how to do it in case he has to.
At this very moment, both parents are out of the nest box and Poppet is grooming Arthur and occasionally plucking a feather from the back of his head. Niiiice. 
