One thing that I've noticed with Disco since I got him two weeks ago is that he almost constantly makes a crunching noise. It sounds like he's eating something but I know he isn't since he's sitting on one of his perches when he does it. One other thing he does is when I'm the only one in the room with him and I'm talking to him he'll just open his beak for a few seconds but then maybe a minute later he'll start chirping/singing.
I'm more concerned about the crunching noise. Is this normal?