Having spent most of my working life in Animal Welfare and Rescue, I believe that the more intelligent animals, (parrots, dogs, horses, cats, etc.) know exactly what is going on. And can hold their anger and resentment to being given away after loving a former guardian or family. That is not always the case, as said by previous posters. I had a friend who went to prison, and I kept his Amazon until he got out six years later. She was already familiar with me, and the transition was very smooth. During his time away, he would call on the phone and I would let her listen to his voice. When he came home, it was like he was only gone a little while. This bird went crazy when she saw him. Kissing him and covering him with her wings. We were unsure what her reaction would be. You can never tell how these creatures, or any others, will react.