HELP!!!!!!!

[RICCO]

My Indian ringneck has changed, he used to be gentle now he bites me every time I make him step up, pins his eyes small as a dot and grawls. He even bites when I put my finger near him. He doent respond when I say hello or anything responds after multiple time I say it. Sometimes I think I'm doing something wrong. Is it the bluffing stage, how long do I have wait for it to go by? His 4 months old (RICCO)

Thanks in advance

[RICCO]

Yea I notice these behaviors a couple of days ago. But I ignore the bites and his attitude. And yes I didn't reward him until he did something right or I liked.
Thank u