I know it's "common" advice, but I would really suggest you try to curb the screaming (and the attention seeking) with self-rewarding behavior techniques ASAP. Kiwi used to go NUTS when my husband left for work, like falling off his perch, screaming loud enough you could hear it down the block freaking out. He was a rescue, and this was actually pretty low on our lists of priorities with him when we first got him, but we eventually did get around to working on the attention screaming issue (contact calling isn't the same as a tantrum). Since your new baby is doing pretty much the same thing as Kiwi was, I can give first hand suggestions of how we corrected this behavior (don't have any advice on the peas issue though)-
Since we were easily able to tell exactly when his worst "fits" would start, we began with diversions in the morning before my husband left. Instead of feeding Kiwi immediately when we woke him up (around 7am), we waited until my husband was literally walking out the door (around 8:30, so he wasn't starving till noon or anything). We figured it would make him nice and hungry, so he would focus more on food than my husband leaving. While I prepped his food, my husband took him out and placed foraging treats around his cage. I put the dish back in as he was on his way out the door, so Kiwi naturally immediately started eating. It was a near instantaneous behavior modification. He was quite hungry by that point, and so interested in his food and getting himself some treats he didn't seem to notice or care about my husband leaving. It barely took a week before he stopped the morning tantrums. You could easily do this by waking your bird an hour or so before you need to leave, and giving her breakfast on the way out the door. Him starting to scream when we left the room, however, was a much more difficult issue to correct since there wasn't a specific time/situation we could pinpoint, nor could we withhold food all day until we left the living room. We actually contacted the lady at the rescue network we adopted him through on this one. She recommended training him for "independent play" ( which a surprising number of bird owners, us included, have never thought of/heard of). It's a simple concept that trains the bird to be less dependent on their flock for entertainment. Obviously, they do play when your gone, the key is to train them to begin playing as soon as you leave rather than pitch a fit and then play once their bored with screaming. We used small segments cut off toilet paper/paper towel rolls to cue him in that it was time to start playing. When we were about to leave the room, we would hand him a segment and slip away once he had pulled it through the bars and became distracted with it. This took a lot longer, and there were quite a few times he dropped the segment and started screeching instead, but the concept eventually took root. Once he had easily destroyed the segment, he was excited to move on to bigger/better toys. It's a type of self rewarding behavior, where he learns you leaving the room means it's now time to do something fun and rewarding for himself (destroy and forage lol). This one took some persistence, but Kiwi did eventually catch on, and our eardrums no longer fear leaving his sight. And just to be clear, we no longer need to cue the behavior by giving him chewing material when we leave the room, that was just a way to introduce the concept. He's learned us leaving means it's time to start playing. Best of luck, and I hope this has helped.
I feel a bit sick waiting, because he has rather a few odd looking feathers.
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