That's interesting. I originally purchased Mac for Willo. They both had a strong hate for each other instantly. I than purchased Dorian. Both loved Dorian instantly. Dorian loved Willo and Dorian adjusted to being friends with Max when WILLO DIED. Max and dorian never preened each other but they ate together they flew to the same spots together and they went to bed together. Birds do not automatically like each other. They're just like people they choose who their friends are.