Good advise. I love to answer my 'flock' call with "I hear you, I am ignoring you, but I hear you! LOL Mine does call a lot when I am out of the room, but if I answer the first few they become farther apart. Good luck. And remember, that 4 months to you may seem like a long time, but to a parrot it is just a blink of an eye and he is still very scared of your reaction to things.