Parrot training gone terribly, terribly wrong

[Ursibear]

How are things going now, nine days later?

My boyfriend got seriously ill the day after I wrote last (this time it wasn't parrot related, i swear) and I have been with him in the hospital whenever I wasn't working, so Sisu hasn't been very happy with me.
I assume he hasn't been screaming, because if he did, we'd all be living under a bridge. That's good news (i think).
When i have been with him, he has been moody, sometimes sticking to me like a tick, sometimes pretending to preen when i talked to him. For the sake of not losing an argument with a 153 gram little guy, I've let him be on my shoulder whenever he was wanted to. I am aware that It's going to take forever to fix this behavior if I encourage it, but I've got plenty of things on my plate right now and this keeps both of us mellow (for now).
Whenever he has been on my shoulder he's been chattering and whistling at human level, which I'm very happy about.
I think I found out why and when he bites, though. My boyfriend was home briefly 3 days ago before getting worse and going back. That day I had Sisu on my shoulder and I was giving my boyfriend a neck massage and the birdie started walking down my arm to get on him. Because my boyfriend doesn't want him anywhere near his skin, i lifted my arm to prevent Sisu to continue descending. When he saw that he bit me, hard.
Thinking back, everytime has bitten has been because he was prevented from going somewhere he wanted to go, or because he was being pushed to go somewhere. I've thought about this and the only thing that could fix that behavior would be to just withstand the bites. But his beak is so sharp it tears right through the flesh, so i was considering filing it down a little on both ends with a nail file to get rid of the pain. Has anyone tried this? How does this work out if so?
Well the TL;DR version of this is... I don't really know if his behavior these past days is an improvement or even a worsening, or because he's been alone a lot.
Things should go back to normal in a day or two, and then we'll see

By the way, I made a perch-on-balance like you guys suggested! Thanks a lot for that btw He did bite me the two first times i tried to put him there, but he sat on it the third time. He has gained 2 grams since i got him, I don't know whether to be worried or not, but it could be that i've finally found a brand of pellets he likes. Tropican, he chows them down like the world is going to end tomorrow morning. They are smallish and nice, i just wish they didn't smell so much like strawberry bubblegum...

[Ursibear]

Oh yes i forgot to add...
He has also completely lost interest in playing with every toy he has. He now chooses to rip all my coffee filters to shreds instead
He hasn't flown ever since i let him go back to my shoulder. Which is a pity, because if he did, he could go wherever he wanted himself instead of biting me out of frustration

[Polarn]

Quick about the pellets, I've smelled em and as you say, it smells like a bubblegum factory, so I never bought em. If something smells like that I don't want my birds to eat it, couse something is off. But then I never really checked what's in them, I just based it on the smell.

About the toys. Well, you need to rotate toys frequently, basically you need tons of toys so that you can change atleast weekly and put the used toys away and save them for atleast a month later (and yes this is either a massive amount of money kept in boxes, or a massive amount of time spent building these toys. But you basically would want something like 25 toys minimum, and then put some away while having some up and rotate them to keep the interest up.

[Eurycerus]

I've been thinking about you actually so I'm glad to hear from you. I'm sorry to hear that you're boyfriend had been sick. That is so stressful. I hate it when its happened to me because Dave is five hours away and i can't visit without taking time off work....

I learned something new that makes sense. Parrots are perceptive to puerile touching their favorite person and can get more upset when seeing that. I can't actually change my behavior until i get a bigger place but it was interesting

[Ursibear]

Hello guys,
Today i was going to write about how happy I am that Sisu is making progress! ... probably.
He loves his pellets, lets the bunnies lick his head, and gets in the cage when i say "in". He even lets me place my hand over his back now
However. The last few days I have been asking him to step up on my finger from his cage door, then clicked the clicker and gave him a sunflower seed. It's been great, that's why I didn't see the bite coming.
This morning instead of taking the sunflower seed he decided to bite down my thumb instead. Unluckily enough he got my pad, so he managed to chomp down in such a way that I actually had to get it fixed with 2 stitches
Before i went to the emergency room I had to grab him because my boyfriend didn't want to be alone with him outside of the cage. He started playing with his marbles right away when I put him in the cage though, so I suppose he isn't all too bothered about the episode. Now he is asking for cuddles again, but he's out of luck as I don't feel particularly forgiving atm
Still wondering what triggered the bite tho. It was the normal routine...

[Eurycerus]

Oh no! Gosh your parrot has a fierce bite. I'm so sorry! Probably if nika got someone just right she'd result in stitches too. Scary.... I saw some poor woman who doesn't have health insurance and her Senegal mauled her finger and now she probably has permanent nerve damage! Ouch! Nika has been horrible lately so I'm pretty parrots are just persnickety :/ i really wish that their method of communication was more clear....

Glad to hear that in general your monster is doing better seems the trouble with older parrots is you just don't know their past and what led them to feel that vicious attacks are the best way to solve things...