Hello all : I am the owner of a 12 year old sulphur crested cockatoo since he was just a baby bird .He is a really happy bird and goes with me wherever I go including to work on the farm(s) I work on. When at work he sits a top a ladder with a branch on top to chew or I sit him in a tree . He absolutely hates other birds , especially the wild cockatoos , and on occasion when one lands on his ladder he'll peck until the intruder flies away .During apple harvest he loves to chew and destroy numerous apples just to get at the seeds and he loves to ride on my shoulder while I drive the tractor . As long as he can see me everything is alright in his eyes but if he loses track of me he calls out to be picked up . He loves being picked up and cuddled and have his legs , ,back , wings and head rubbed or patted or loves to play hide and seek under the quilt on my bed with me . He has a cage he waddles to from the bed for food or water or to play with his toys . He was a pretty quiet bird for the last ten years but lately he has become a lot noisier to the point he starts to drive me crazy for short periods of time . I know almost all his unique squawks, screams and growls He growls when he wants to be fed his favorite food - minted peas which I feed to him by hand to fill him up before I leave with him to go to work , or gives out happy screams when he is happy - dancing side to side and flicking his head. However recently he gives out little short irritating squawks when I'm in his presence that drive me mad .I normally would put him outside in a tree till he chills out , but I can't do this if I am staying in a hotel and he appears to do this when he is relaxed and at rest with his cheek feathers covering his beak . Other times he squawks angrily just for no reason . The other thing he does is lash out and bite when I'm giving him a pet for no apparent reason . People tell me he is a spoiled rotten bird and I have to agree with them because he pretty much gets what he wants . Any idea what has changed or has changed his behaviour ?