Why screaming is a rational choice for your parrot
A parrot in the wild keeps contact with flock mates across distances with calls designed to carry through trees, and in a house your parrot uses the same equipment to reach you in the kitchen from his cage in the living room. If you answer, call back, or appear — even annoyed — the scream has worked, and a behaviour that works is repeated. Shouting back joins the flock chorus rather than ending it, and rushing in to offer treats to quiet him pays the loudest behaviour he owns.
The way out is not to make attention scarcer but to make a quiet signal more reliable than screaming. He keeps a way to reach you; he just upgrades to a tool you both prefer.
Pick a replacement signal he can succeed with
Choose something already within his repertoire and easy to hear without being piercing: a short whistle phrase, a word he says, a soft chime from a sturdy cage bell he can ring, or a specific gentle contact call. Talking species often take to a word or whistle fastest because you can model it; a bell suits a bird who is not vocally inclined but is physically busy. Whichever you choose, it must be one signal, agreed by the household, so he is never confused about which sound opens the door to company.
Start when you are in the same room. Model the signal yourself — whistle the phrase or say the word in a bright tone — and when he offers anything close to it, respond at once with attention, conversation, and a small reward. If you chose a bell, touch it to make the sound, reward him for investigating, then for nudging it, until ringing it deliberately is his move.
Reward the quiet, wait out the loud
Now apply the household rule without exception: the quiet signal gets a fast, warm response, and screaming gets a neutral wait. When he screams, stay where you are, avoid calling back, and watch for a pause of several seconds or, better, any use of the quiet signal — then go to him, greet him, and reward the sound he used last.
Expect an early surge in volume and persistence when screaming stops working; he is testing whether a bigger effort restores the old rule. If anyone breaks during the surge and rushes in, the lesson becomes that very loud, long screaming works, so prepare the household for that phase and support each other through it. Meanwhile, reduce his need to call: schedule predictable flock time, work, and play with him daily, provide foraging toys before you leave the room, and tell him when you are going, because a parrot who can predict company screams less to summon it.
Extend the signal across the house
Once he uses the signal reliably nearby, practise at increasing distances: from the doorway, then the next room, responding to the signal with a call back in the same quiet form and arriving within a short time. Note the times of day he calls most and pre-empt his hardest windows with a foraging session or time out with the family.
Contact an avian veterinarian if screaming is a sudden change in an adult bird or comes with reduced appetite, feather plucking, discharge, or breathing changes, and seek a qualified parrot behaviour consultant if screaming occupies much of the day despite consistent training. To hold the household line, KinsLe Care Teams can carry the agreed signal, the respond-and-wait rule and daily practice as shared tasks with timestamped completions, so your parrot gets the same fair answer from every member of his flock.