Eclectus Parent Raised babies

[Stickler]

Hi I am new to this forum and breeding Eclectus I currently have 2 babies 3.5 weeks old being parent raised. The mother is very aggressive and doesn't like you checking in the box at all. The parents are eating loads and the father is doing his job feeding the mum also. we have been able to sight them moving but they are so quiet. I thought you would hear them more often as they became older. Is this normal?