Hmm, good questions. I wish I had answers for you but I have no actual experience with parrots, just stuff that I've read. My concern is that adding more might just cause two to gang up on one, so that may not be the best solution at least right off the bat. Maybe try adding more caves and hiding places? I've watched this guy's videos on youtube, and while I'm not sure how much actual information there are in his videos that will help you, at least you get a look into how his tank is arranged etc. It's cool how his channel shows the progression from 1 parrot to a bunch, back to just a couple. I think he also ran into aggression issues etc, so worth at least a look from a "change over time" perspective.
if you have all the time in the world (or just watch on 1.75x like I did lol), you should start with the videos from 3 years ago. His showpiece blood parrot, fireball, really makes for some great stories and videos! https://www.youtube.com/c/Sassonic/videos
if you have all the time in the world (or just watch on 1.75x like I did lol), you should start with the videos from 3 years ago. His showpiece blood parrot, fireball, really makes for some great stories and videos! https://www.youtube.com/c/Sassonic/videos
