I have 2 parakeets and 2 linnies. I SLOWLY allowed them to interact. My parakeets attacked my linnies, because it is in their nature to attack and rid their packs of weak members. Although not physically weak, my linnies are much slower-moving, docile sweethearts, which my parakeets interpreted as weakness or illness. I have them one more chance to be together, and, again, my OTHER linnie was attacked.....and received a permanent disfigurement of one of his nostrils. PLEASE be aware of this behavioral difference and the potentially lethal consequences of allowing parakeets and linnies to interact.