I recently rescued a moluccan male cockatoo. He was very happy with just me for about two weeks. then suddenly my boyfriend came and visited and spent some time with him. we think he tried mating with him on his hand. now that my boyfriend left and it is just us he is very angry/frusterated. he used to be calm and do his occasional whistle and babble. however, now, he is bobbing up and down and lot with his wings half out and doing a very angry loud babble and plucking out his feathers and biting his feat/nails. im not sure what to do but he was so content and happy before. I know he had male owners before me. can anyone explain what is going on and offer any advice to make him feel better?