I have no idea why my cockatiel is screaming
I have a 3 month old cockatiel. I’m having a lot of problems with her that I have no idea how to help. Above all, she does this scream/growl sort of sound when: she sees food/treats; I’m nearby and/or she’s climbing onto my shoulder; she’s uncomfortable/wants me to leave; and she’s tired and wants to nap on me (and she won’t nap anywhere else). A vet told me that she’s just young and new, but the pattern of why and when she does it doesn’t seem to make any sense. Why does she do this, and how can I stop this?