The screaming may be loud,but the guilting of "you left me alone"is much worse. My Kumiko has that last part down to an art form. She developed panic attacks after the vet visit involving blood withdrawal and micro chipping. The quietest bird in the world actually made loud noises!WTF! I like loud birds, but I like them loud for the right reasons. Obviously unadulterated fear is not the right reason :-(
Having my friend' s cat around stopped the problem, but eventually, we did have to go home, where even going to the bathroom gets me yelled at. The solution is flock calling when the screaming happens in normal situations-- just make sure you decide flockcall and make it something relatively quiet{the one used in my house for decades sounds kind of like a dove cooing, but somehow Kumiko decides it sounds like a growling kind of wild cat purring – which is entirely separate from the actual act of macaw purring that she's done at least once(the whole body rumbles under your hand. It's short-lived, but really cool
Anyway, the solution has been to get Kumiko a pet. I contacted a dog pound that I know has smaller birds I've already have vast experience with – not to mention spare cages for. Waiting for a call back from their foster person so I can get an idea of personality these birds before I decide to go get one{options are cockatiels and budgies}.
The idea is not for these birds to interact physically, but rather for her to have someone physically in the room with her at all times(and these are species that I would get anyway, as I always end up with another one in the house sooner or later in the absence of one.
In other words, if it doesn't work, I'm not put out any except my schedule being thrown off a bit for reacquiring the flock members I'm used to. Originally, I was going to focus on replacing my murdered Congo African grey first – besides, Valentino was a service animal, and did things I need that Kumiko can't. Still, I think Kumiko's mental health is more important. Valentino had pet beagles: why shouldn't the calico macaw have a pet too?